Fixes an issue with specs after showing a UIAlertView

Turns out iOS 8 is changing the root UIWindow class to _UIAlertControllerShimPresenterWindow instead of just UIWindow after an app shows a UIAlertView. Boooo.
Displaying an actionsheet no longer increments the window count in iOS 8
Fix JSON ruby example syntax error.
Merge pull request #427 from carlwoodward/fix-readme-json-example

Fix JSON ruby example syntax error.
Merge pull request #426 from rubymotion/fix-uialertview-specs

Fix uialertview specs
Add vendor identifier.
Add vendor identifier details to readme.