Add bower to package.json

Author: Nick Litwin

package.json

@@ -5,9 +5,6 @@
     "type": "git",
     "url": "git+https://github.com/appirio-tech/topcoder-app.git"
   },
-  "scripts": {
-    "postinstall": "bower install"
-  },
   "keywords": [
     "topcoder",
     "account",
@@ -22,6 +19,7 @@
   },
   "homepage": "https://github.com/appirio-tech/topcoder-app#readme",
   "devDependencies": {
+    "bower": "^1.4.1",
     "browser-sync": "^2.7.12",
     "chai": "^3.0.0",
     "connect-history-api-fallback": "^1.1.0",