UIImageAsset tinted image support

If an image as alternate representations, tint them too!

0.2.8: Update podspec, move MGImageUtilities inline to fix warnings

MGImageUtilities is not longer supported by the author.

0.2.7

Fix gradient image generation with released CFArrayRef

0.2.6

Update podspec

0.2.5

Update MCUIImageAdvanced.podspec

0.2.4

Add validation on generate image if size is zero

Add generate circle image

A new method was added to generate a circle image from code using CoreGraphics

+ (UIImage *)mc_generateCircleImageOfSize:(CGSize)size color:(UIColor *)color;