Added bitcoin donation support

Author: rahul286

README.md

@@ -113,7 +113,9 @@ ee site create example.com --php --pagespeed     # create example.com php site w
 
 ## Donations
 
-[![Donate](https://cloud.githubusercontent.com/assets/4115/5297691/c7b50292-7bd7-11e4-987b-2dc21069e756.png)]  (https://rtcamp.com/donate/?project=easyengine)
+[![PayPal-Donate](https://cloud.githubusercontent.com/assets/4115/5297691/c7b50292-7bd7-11e4-987b-2dc21069e756.png)]  (https://rtcamp.com/donate/?project=easyengine)
+
+[![BitCoin-Donate](https://bitpay.com/img/donate-button.svg)](https://bitpay.com/417008/donate)
 
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