Improvements on documentation (#340)

* Improvements on documentation and some refactor

* ts | js -> typescript (docs)

src/plugins/badge.ts

@@ -8,8 +8,8 @@ import { Cordova, Plugin } from './plugin';
  * Requires Cordova plugin: cordova-plugin-badge. For more info, please see the [Badge plugin docs](https://github.com/katzer/cordova-plugin-badge).
  *
  * @usage
- * ```js
- * import {Badge} from 'ionic-native';
+ * ```typescript
+ * import { Badge } from 'ionic-native';
  *
  *
  * Badge.set(10);
@@ -74,4 +74,5 @@ export class Badge {
    */
   @Cordova()
   static registerPermission(): Promise<any> { return; }
+
 }