Fix bower metadata

Author: Philipp Alferov

bower.json

@@ -1,10 +1,13 @@
 {
   "name": "angular-file-saver",
   "version": "0.0.1",
+  "main": [
+    "src/file-saver.js"
+  ],
   "authors": [
     "Philipp Alferov <[email protected]>"
   ],
-  "description": "Provides integration between FileSaver.js (implements HTML5 saveAs()) and angular",
+  "description": "An AngularJS service that implements the HTML5 W3C saveAs() in browsers that do not natively support it",
   "keywords": [
     "filesaver",
     "angular",