Add build script

Author: abhisekp

package.json

@@ -8,6 +8,9 @@
     "url": "git://github.com/stephenb/node-notes.git"
   },
   "main": "./lib/notes",
+  "scripts": {
+    "build": "cake build"
+  },
   "engines": {
     "node": ">= v0.4.7"
   },