Fix jsdoc of style.get and similar get functions.

jsdoc attempts to put `style.get` into the `geo.feature.style`
namespace, but `geo.feature.style` is a function, not a namespace, so it
doesn't appear.  This adds a jsdoc plugin that allows putting a dot in
the name of a doclet that appears in the rendered documentation.  This
results ins `style.get` appearing in the list of `geo.feature`'s
methods.

jsdoc.conf.json

@@ -5,6 +5,7 @@
   "plugins": [
     "jsdoc/plugins/events",
     "jsdoc/plugins/typedef_augments",
+    "jsdoc/plugins/dot_in_name",
     "node_modules/jsdoc-autoprivate/autoprivate.js",
     "plugins/markdown"
   ],

jsdoc/plugins/dot_in_name.js

@@ -0,0 +1,15 @@
+/**
+ * Allow doclet names to include a dot.  The text '_DOT_' is replaced by a dot
+ * in the documentation.
+ */
+var dotToken = '_DOT_';
+
+exports.handlers = {
+  processingComplete: function (e) {
+    e.doclets.forEach(function (doclet) {
+      if (doclet.name.indexOf(dotToken) >= 0) {
+        doclet.name = doclet.name.replace(new RegExp(dotToken, 'g'), '.');
+      }
+    });
+  }
+};

src/choroplethFeature.js

@@ -162,6 +162,9 @@ var choroplethFeature = function (arg) {
    * A uniform getter that always returns a function even for constant values.
    * If undefined input, return all the choropleth values as an object.
    *
+   * @function choropleth_DOT_get
+   * @memberof geo.choroplethFeature
+   * @instance
    * @param {string|undefined} key defines one of the attributes of a
    *  choropleth.
    * @return {function}

src/feature.js

@@ -440,6 +440,9 @@ var feature = function (arg) {
    * A uniform getter that always returns a function even for constant styles.
    * This can also return all defined styles as functions in a single object.
    *
+   * @function style_DOT_get
+   * @memberof geo.feature
+   * @instance
    * @param {string} [key] If defined, return a function for the named style.
    *    Otherwise, return an object with a function for all defined styles.
    * @returns {function|object} Either a function for the named style or an

src/meshFeature.js

@@ -157,6 +157,9 @@ var meshFeature = function (arg) {
    * A uniform getter that always returns a function even for constant values.
    * If undefined input, return all the mesh values as an object.
    *
+   * @function mesh_DOT_get
+   * @memberof geo.meshFeature
+   * @instance
    * @param {string|undefined} key The name of the mesh key or `undefined` to
    *    return an object with all keys as functions.
    * @returns {object|function} A function related to the key, or an object