Added scripts for heroku

Author: moizKachwala

package.json

@@ -5,10 +5,11 @@
   "scripts": {
     "clean": "gulp clean",
     "compile": "gulp compile",
-    "build": "gulp build",
+    "build": "./node_modules/.bin/gulp build",
     "deploy": "concurrent --kill-others \"gulp watch\" \"gulp start\"",
-    "postinstall": "gulp installTypings && gulp build",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "postinstall": "npm run installTypings && npm run build",
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "installTypings": "./node_modules/.bin/gulp installTypings"
   },
   "repository": {
     "type": "git",