fix(npm): include list in published module

Also remove post install script to install third-party typings

Closes #21
Closes #20

Author: jeffbcross

package.json

@@ -1,14 +1,17 @@
 {
   "name": "angularfire2",
-  "version": "2.0.0-alpha.1",
+  "version": "2.0.0-alpha.2",
   "description": "",
   "main": "dist/angularfire.js",
   "scripts": {
     "test": "npm run build; karma start",
     "build": "tsc",
-    "postinstall": "typings install",
     "install_webdriver": "./node_modules/.bin/webdriver-manager update"
   },
+  "files": [
+    "dist",
+    "LICENSE"
+  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/angular/indy.git"