fix: removing bower install in postinstall script

Author: dennybiasiolli

CONTRIBUTING.md

@@ -5,10 +5,10 @@
 ## for fixes
 
 1. This is for a fix or a patch for a found bug
-- Fork this project and install the packages with npm
+- Fork this project and install the packages with npm and bower
 
   ```
-  npm install
+  npm install && npm run bower install
   ```
 - Create a new patch branch
 - Code code code and amend the file `src/angular-pdf.js`

package.json

@@ -35,8 +35,8 @@
     "phantomjs-prebuilt": "^2.1.4"
   },
   "scripts": {
+    "bower": "bower",
     "build": "grunt",
-    "postinstall": "bower install",
     "start": "http-server ./example -p 8081",
     "test": "grunt --verbose"
   }