remove bower dependency

Author: Christina

package.json

@@ -18,7 +18,7 @@
   },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "postinstall": "bower install"
+    "postinstall": "node_modules/bower/bin/bower install"
   },
   "repository": {
     "type": "git",