add RSMoveAndScaleTrait, Avatar's delegate should implement overlay for move and scale
fix: retain actionsheet
if overlay position
fix scale image border
Remove cast warnings
Merge pull request #1 from Threadflip/warning-fix

Remove cast warnings
alter header file.
Merge pull request #2 from lognllc/master

add clippingMask method
update clippingMask method
Merge branch 'master' of github.com:b051/RSAvatarController
scrollView.frame should based on destination image size
support foreground color and overlay sizing detect
fix _originImage = nil; problem when reloading view
add edgeInsets support when resizing.
fix image orientation [right]
fix rotation with edge insets
make zoom scale configurable via appearance api.
update view lifecycle
supports scrollFrameEdgeInsets adjust; fix imageview initial position.
supports Appearance API, make all screen touchable.