exported all the code from the ShimmerTextView to a helper class and created ShimmerButton
code cleanup and comments
Merge branch 'master' into develop
added onSizeChanged() in Button/TextView to make sure the LinearGradient will be reset
remove onAttachedToWindow()
Merge pull request #8 from Keanu/develop

added onSizeChanged() in Button/TextView to make sure the LinearGradient will be reset
only call setup callback when first set up
version 1.2.0