Animation on Cancel whilst scanning [enhancement]

[JSmyth886]

I think you could apply your boolean greater than iOS7 logic to the Cancel method within MobileBarcodeScanner class. This will allow animations for anything greater than iOS7 whilst still maintaining the bug fix for the black screen on iOS7.

[JSmyth886]

I have updated my fork with the necessary changes to allow the use of this boolean to allow the animations.

[Redth]

This deals with PR #345

[Redth]

Closing, let's move the conversation to #345