diff --git a/Pipfile.lock b/Pipfile.lock
index 74554b2..9da8c55 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -16,10 +16,16 @@
     "default": {
         "click": {
             "hashes": [
-                "sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13",
-                "sha256:5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7"
+                "sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a",
+                "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"
             ],
-            "version": "==7.0"
+            "version": "==7.1.2"
+        },
+        "future": {
+            "hashes": [
+                "sha256:b1bead90b70cf6ec3f0710ae53a525360fa360d306a86583adc6bf83a4db537d"
+            ],
+            "version": "==0.18.2"
         },
         "htmlmin": {
             "hashes": [
@@ -29,10 +35,17 @@
         },
         "jinja2": {
             "hashes": [
-                "sha256:065c4f02ebe7f7cf559e49ee5a95fb800a9e4528727aec6f24402a5374c65013",
-                "sha256:14dd6caf1527abb21f08f86c784eac40853ba93edb79552aa1e4b8aef1b61c7b"
+                "sha256:89aab215427ef59c34ad58735269eb58b1a5808103067f7bb9d5836c651b3bb0",
+                "sha256:f0a4641d3cf955324a89c04f3d94663aa4d638abe8f733ecd3582848e1c37035"
+            ],
+            "version": "==2.11.2"
+        },
+        "joblib": {
+            "hashes": [
+                "sha256:0630eea4f5664c463f23fbf5dcfc54a2bc6168902719fa8e19daf033022786c8",
+                "sha256:bdb4fd9b72915ffb49fde2229ce482dd7ae79d842ed8c2b4c932441495af1403"
             ],
-            "version": "==2.10.1"
+            "version": "==0.14.1"
         },
         "jsmin": {
             "hashes": [
@@ -47,12 +60,22 @@
             ],
             "version": "==2.6.1"
         },
+        "lunr": {
+            "extras": [
+                "languages"
+            ],
+            "hashes": [
+                "sha256:aab3f489c4d4fab4c1294a257a30fec397db56f0a50273218ccc3efdbf01d6ca",
+                "sha256:c4fb063b98eff775dd638b3df380008ae85e6cb1d1a24d1cd81a10ef6391c26e"
+            ],
+            "version": "==0.5.8"
+        },
         "markdown": {
             "hashes": [
-                "sha256:2e50876bcdd74517e7b71f3e7a76102050edec255b3983403f1a63e7c8a41e7a",
-                "sha256:56a46ac655704b91e5b7e6326ce43d5ef72411376588afa1dd90e881b83c7e8c"
+                "sha256:1fafe3f1ecabfb514a5285fca634a53c1b32a81cb0feb154264d55bf2ff22c17",
+                "sha256:c467cd6233885534bf0fe96e62e3cf46cfc1605112356c4f9981512b8174de59"
             ],
-            "version": "==3.1.1"
+            "version": "==3.2.2"
         },
         "markupsafe": {
             "hashes": [
@@ -60,13 +83,16 @@
                 "sha256:09027a7803a62ca78792ad89403b1b7a73a01c8cb65909cd876f7fcebd79b161",
                 "sha256:09c4b7f37d6c648cb13f9230d847adf22f8171b1ccc4d5682398e77f40309235",
                 "sha256:1027c282dad077d0bae18be6794e6b6b8c91d58ed8a8d89a89d59693b9131db5",
+                "sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42",
                 "sha256:24982cc2533820871eba85ba648cd53d8623687ff11cbb805be4ff7b4c971aff",
                 "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b",
                 "sha256:43a55c2930bbc139570ac2452adf3d70cdbb3cfe5912c71cdce1c2c6bbd9c5d1",
                 "sha256:46c99d2de99945ec5cb54f23c8cd5689f6d7177305ebff350a58ce5f8de1669e",
                 "sha256:500d4957e52ddc3351cabf489e79c91c17f6e0899158447047588650b5e69183",
                 "sha256:535f6fc4d397c1563d08b88e485c3496cf5784e927af890fb3c3aac7f933ec66",
+                "sha256:596510de112c685489095da617b5bcbbac7dd6384aeebeda4df6025d0256a81b",
                 "sha256:62fe6c95e3ec8a7fad637b7f3d372c15ec1caa01ab47926cfdf7a75b40e0eac1",
+                "sha256:6788b695d50a51edb699cb55e35487e430fa21f1ed838122d722e0ff0ac5ba15",
                 "sha256:6dd73240d2af64df90aa7c4e7481e23825ea70af4b4922f8ede5b9e35f78a3b1",
                 "sha256:717ba8fe3ae9cc0006d7c451f0bb265ee07739daf76355d06366154ee68d221e",
                 "sha256:79855e1c5b8da654cf486b830bd42c06e8780cea587384cf6545b7d9ac013a0b",
@@ -83,17 +109,19 @@
                 "sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6",
                 "sha256:c8716a48d94b06bb3b2524c2b77e055fb313aeb4ea620c8dd03a105574ba704f",
                 "sha256:cd5df75523866410809ca100dc9681e301e3c27567cf498077e8551b6d20e42f",
-                "sha256:e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7"
+                "sha256:cdb132fc825c38e1aeec2c8aa9338310d29d337bebbd7baa06889d09a60a1fa2",
+                "sha256:e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7",
+                "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be"
             ],
             "version": "==1.1.1"
         },
         "mkdocs": {
             "hashes": [
-                "sha256:17d34329aad75d5de604b9ed4e31df3a4d235afefdc46ce7b1964fddb2e1e939",
-                "sha256:8cc8b38325456b9e942c981a209eaeb1e9f3f77b493ad755bfef889b9c8d356a"
+                "sha256:096f52ff52c02c7e90332d2e53da862fde5c062086e1b5356a6e392d5d60f5e9",
+                "sha256:f0b61e5402b99d7789efa032c7a74c90a20220a9c81749da06dbfbcbd52ffb39"
             ],
             "index": "pypi",
-            "version": "==1.0.4"
+            "version": "==1.1.2"
         },
         "mkdocs-material": {
             "hashes": [
@@ -105,59 +133,100 @@
         },
         "mkdocs-minify-plugin": {
             "hashes": [
-                "sha256:3000a5069dd0f42f56a8aaf7fd5ea1222c67487949617e39585d6b6434b074b6",
-                "sha256:d54fdd5be6843dd29fd7af2f7fdd20a9eb4db46f1f6bed914e03b2f58d2d488e"
+                "sha256:06fecd8ddb9cb90f30bcee2d94c3d4b46a090f403d7ff0edff089a435906c4ee",
+                "sha256:9bac96276b1681debb3eb2cf5bae972586b4c1138e8d78ea63a984ea6276563d"
             ],
-            "version": "==0.2.1"
+            "version": "==0.3.0"
+        },
+        "nltk": {
+            "hashes": [
+                "sha256:845365449cd8c5f9731f7cb9f8bd6fd0767553b9d53af9eb1b3abf7700936b35"
+            ],
+            "version": "==3.5"
         },
         "pygments": {
             "hashes": [
-                "sha256:71e430bc85c88a430f000ac1d9b331d2407f681d6f6aec95e8bcfbc3df5b0127",
-                "sha256:881c4c157e45f30af185c1ffe8d549d48ac9127433f2c380c24b84572ad66297"
+                "sha256:647344a061c249a3b74e230c739f434d7ea4d8b1d5f3721bc0f3558049b38f44",
+                "sha256:ff7a40b4860b727ab48fad6360eb351cc1b33cbf9b15a0f689ca5353e9463324"
             ],
-            "version": "==2.4.2"
+            "version": "==2.6.1"
         },
         "pymdown-extensions": {
             "hashes": [
-                "sha256:25b0a7967fa697b5035e23340a48594e3e93acb10b06d74574218ace3347d1df",
-                "sha256:6cf0cf36b5a03b291ace22dc2f320f4789ce56fbdb6635a3be5fadbf5d7694dd"
+                "sha256:5bf93d1ccd8281948cd7c559eb363e59b179b5373478e8a7195cf4b78e3c11b6",
+                "sha256:8f415b21ee86d80bb2c3676f4478b274d0a8ccb13af672a4c86b9ffd22bd005c"
             ],
-            "version": "==6.0"
+            "version": "==7.1"
         },
         "pyyaml": {
             "hashes": [
-                "sha256:57acc1d8533cbe51f6662a55434f0dbecfa2b9eaf115bede8f6fd00115a0c0d3",
-                "sha256:588c94b3d16b76cfed8e0be54932e5729cc185caffaa5a451e7ad2f7ed8b4043",
-                "sha256:68c8dd247f29f9a0d09375c9c6b8fdc64b60810ebf07ba4cdd64ceee3a58c7b7",
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-                "sha256:86a93cccd50f8c125286e637328ff4eef108400dd7089b46a7be3445eecfa391",
-                "sha256:a0f329125a926876f647c9fa0ef32801587a12328b4a3c741270464e3e4fa778",
-                "sha256:a3c252ab0fa1bb0d5a3f6449a4826732f3eb6c0270925548cac342bc9b22c225",
-                "sha256:b4bb4d3f5e232425e25dda21c070ce05168a786ac9eda43768ab7f3ac2770955",
-                "sha256:cd0618c5ba5bda5f4039b9398bb7fb6a317bb8298218c3de25c47c4740e4b95e",
-                "sha256:ceacb9e5f8474dcf45b940578591c7f3d960e82f926c707788a570b51ba59190",
-                "sha256:fe6a88094b64132c4bb3b631412e90032e8cfe9745a58370462240b8cb7553cd"
+                "sha256:06a0d7ba600ce0b2d2fe2e78453a470b5a6e000a985dd4a4e54e436cc36b0e97",
+                "sha256:240097ff019d7c70a4922b6869d8a86407758333f02203e0fc6ff79c5dcede76",
+                "sha256:4f4b913ca1a7319b33cfb1369e91e50354d6f07a135f3b901aca02aa95940bd2",
+                "sha256:69f00dca373f240f842b2931fb2c7e14ddbacd1397d57157a9b005a6a9942648",
+                "sha256:73f099454b799e05e5ab51423c7bcf361c58d3206fa7b0d555426b1f4d9a3eaf",
+                "sha256:74809a57b329d6cc0fdccee6318f44b9b8649961fa73144a98735b0aaf029f1f",
+                "sha256:7739fc0fa8205b3ee8808aea45e968bc90082c10aef6ea95e855e10abf4a37b2",
+                "sha256:95f71d2af0ff4227885f7a6605c37fd53d3a106fcab511b8860ecca9fcf400ee",
+                "sha256:b8eac752c5e14d3eca0e6dd9199cd627518cb5ec06add0de9d32baeee6fe645d",
+                "sha256:cc8955cfbfc7a115fa81d85284ee61147059a753344bc51098f3ccd69b0d7e0c",
+                "sha256:d13155f591e6fcc1ec3b30685d50bf0711574e2c0dfffd7644babf8b5102ca1a"
+            ],
+            "version": "==5.3.1"
+        },
+        "regex": {
+            "hashes": [
+                "sha256:1386e75c9d1574f6aa2e4eb5355374c8e55f9aac97e224a8a5a6abded0f9c927",
+                "sha256:27ff7325b297fb6e5ebb70d10437592433601c423f5acf86e5bc1ee2919b9561",
+                "sha256:329ba35d711e3428db6b45a53b1b13a0a8ba07cbbcf10bbed291a7da45f106c3",
+                "sha256:3a9394197664e35566242686d84dfd264c07b20f93514e2e09d3c2b3ffdf78fe",
+                "sha256:51f17abbe973c7673a61863516bdc9c0ef467407a940f39501e786a07406699c",
+                "sha256:579ea215c81d18da550b62ff97ee187b99f1b135fd894a13451e00986a080cad",
+                "sha256:70c14743320a68c5dac7fc5a0f685be63bc2024b062fe2aaccc4acc3d01b14a1",
+                "sha256:7e61be8a2900897803c293247ef87366d5df86bf701083b6c43119c7c6c99108",
+                "sha256:8044d1c085d49673aadb3d7dc20ef5cb5b030c7a4fa253a593dda2eab3059929",
+                "sha256:89d76ce33d3266173f5be80bd4efcbd5196cafc34100fdab814f9b228dee0fa4",
+                "sha256:99568f00f7bf820c620f01721485cad230f3fb28f57d8fbf4a7967ec2e446994",
+                "sha256:a7c37f048ec3920783abab99f8f4036561a174f1314302ccfa4e9ad31cb00eb4",
+                "sha256:c2062c7d470751b648f1cacc3f54460aebfc261285f14bc6da49c6943bd48bdd",
+                "sha256:c9bce6e006fbe771a02bda468ec40ffccbf954803b470a0345ad39c603402577",
+                "sha256:ce367d21f33e23a84fb83a641b3834dd7dd8e9318ad8ff677fbfae5915a239f7",
+                "sha256:ce450ffbfec93821ab1fea94779a8440e10cf63819be6e176eb1973a6017aff5",
+                "sha256:ce5cc53aa9fbbf6712e92c7cf268274eaff30f6bd12a0754e8133d85a8fb0f5f",
+                "sha256:d466967ac8e45244b9dfe302bbe5e3337f8dc4dec8d7d10f5e950d83b140d33a",
+                "sha256:d881c2e657c51d89f02ae4c21d9adbef76b8325fe4d5cf0e9ad62f850f3a98fd",
+                "sha256:e565569fc28e3ba3e475ec344d87ed3cd8ba2d575335359749298a0899fe122e",
+                "sha256:ea55b80eb0d1c3f1d8d784264a6764f931e172480a2f1868f2536444c5f01e01"
             ],
-            "version": "==5.1.1"
+            "version": "==2020.5.14"
         },
         "six": {
             "hashes": [
-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
+                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
             ],
-            "version": "==1.12.0"
+            "version": "==1.14.0"
         },
         "tornado": {
             "hashes": [
-                "sha256:1174dcb84d08887b55defb2cda1986faeeea715fff189ef3dc44cce99f5fca6b",
-                "sha256:2613fab506bd2aedb3722c8c64c17f8f74f4070afed6eea17f20b2115e445aec",
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-                "sha256:e1d897889c3b5a829426b7d52828fb37b28bc181cd598624e65c8be40ee3f7fa"
+                "sha256:0fe2d45ba43b00a41cd73f8be321a44936dc1aba233dee979f17a042b83eb6dc",
+                "sha256:22aed82c2ea340c3771e3babc5ef220272f6fd06b5108a53b4976d0d722bcd52",
+                "sha256:2c027eb2a393d964b22b5c154d1a23a5f8727db6fda837118a776b29e2b8ebc6",
+                "sha256:5217e601700f24e966ddab689f90b7ea4bd91ff3357c3600fa1045e26d68e55d",
+                "sha256:5618f72e947533832cbc3dec54e1dffc1747a5cb17d1fd91577ed14fa0dc081b",
+                "sha256:5f6a07e62e799be5d2330e68d808c8ac41d4a259b9cea61da4101b83cb5dc673",
+                "sha256:c58d56003daf1b616336781b26d184023ea4af13ae143d9dda65e31e534940b9",
+                "sha256:c952975c8ba74f546ae6de2e226ab3cc3cc11ae47baf607459a6728585bb542a",
+                "sha256:c98232a3ac391f5faea6821b53db8db461157baa788f5d6222a193e9456e1740"
+            ],
+            "version": "==6.0.4"
+        },
+        "tqdm": {
+            "hashes": [
+                "sha256:4733c4a10d0f2a4d098d801464bdaf5240c7dadd2a7fde4ee93b0a0efd9fb25e",
+                "sha256:acdafb20f51637ca3954150d0405ff1a7edde0ff19e38fb99a80a66210d2a28f"
             ],
-            "version": "==6.0.2"
+            "version": "==4.46.0"
         }
     },
     "develop": {}