Update README.md

add donation link

README.md

@@ -8,6 +8,12 @@ Issues list and features requests [here](https://github.com/pushandplay/cordova-
 
 
 
+[Donate with PayPal](https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=MS8RQAS2NVVQW&lc=RU&item_name=github%2ecom&item_number=cordova%2dplugin%2dapprate&currency_code=USD&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHosted)
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 <img src="https://dl.dropboxusercontent.com/u/26238/Cordova/Plugins/AppRate/preview_iPad.png" width="100%" alt="Preview iPad"/>
 
 ## Supported platforms ##
@@ -111,4 +117,4 @@ ar, bn, ca, cs, da, de, el, en, es, fa, fr, he, hi, id, il, ja, ko, nl, no, pa,
 
 ## Licence ##
 
-The Apache 2.0 License
+The Apache 2.0 License