Adds prepare phase

Author: flovilmart

package.json

@@ -72,7 +72,8 @@
     "watch": "PARSE_BUILD=${PARSE_BUILD:=node} gulp watch",
     "integration": "TESTING=1 jasmine --config=jasmine.json",
     "docs": "jsdoc -c ./jsdoc-conf.json ./src",
-    "release_docs": "./release_docs.sh"
+    "release_docs": "./release_docs.sh",
+    "prepare": "npm run build"
   },
   "jest": {
     "automock": true,