Merge pull request #2245 from finiteloopme/install-issue2244

Fix for issue#2244

README_GCE.md

@@ -86,6 +86,8 @@ Install Dependencies
   yum install -y ansible python-libcloud
 ```
 
+> Installation using Mac OSX requires pycrypto library
+> $ pip install pycrypto
 
 Test The Setup
 --------------