added pre-requisite libraries and their versions. fixed sayanee#16

Author: sayanee

readme.md

@@ -12,8 +12,10 @@ Integrate PDF files right into web pages.
 
 ##Requirements
 
-1. [AngularJS](http://angularjs.org/) - get the latest [angular.min.js](https://developers.google.com/speed/libraries/devguide#angularjs)
-1. [PDFJS](http://mozilla.github.io/pdf.js/) - build the files [`pdf.js` and `pdf.worker.js`](https://github.com/mozilla/pdf.js#building-pdfjs)
+Check [`bower.json` file](https://github.com/sayanee/angularjs-pdf/blob/master/bower.json) for dependencies and their versions:
+
+1. [AngularJS](http://angularjs.org/) - get the latest [angular.min.js](https://developers.google.com/speed/libraries/devguide#angularjs) - `v1.2.25`
+1. [PDFJS](http://mozilla.github.io/pdf.js/) - build the files [`pdf.js` and `pdf.worker.js`](https://github.com/mozilla/pdf.js#building-pdfjs) - `v1.0.89`
 
 ###Features