Updated npm support

Author: lannymcnie

package.json

@@ -2,13 +2,21 @@
   "name": "easeljs",
   "version": "1.0.0",
   "description": "EaselJS is a library for building high-performance interactive 2D content in HTML5. It provides a feature-rich display  list to allow you to manipulate and animate graphics. It also provides a robust interactive model for mouse and touch  interactions.",
-  "main": "lib/easeljs.js",
+  "main": "easeljs.js",
   "directories": {
     "doc": "docs",
     "example": "examples",
     "lib": "lib",
     "test": "tests"
   },
+  "npmFileMap": [
+    {
+      "basePath": "lib",
+      "files": [
+        "**/*"
+      ]
+    }
+  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/CreateJS/EaselJS.git"