Issue #75: Fix warning on implicit conversion from CGImageAlphaInfo to CGBitmapInfo (safe according to https://developer.apple.com/library/ios/documentation/graphicsimaging/Reference/CGBitmapContext/Reference/reference.html#//apple_ref/c/func/CGBitmapContextCreate).
Remove Xcode 5 file.
Issue #74: Fix warnings for implicit conversions of UITextAlignment and UILineBreakMode