Fix how secondView layout is updated when onLayout method is invoked.
Update version name to 1.3 and version code to 8.
Update README.md with info related to version 1.3
Update version name and version code to next release number.
sync with upstream
updated fullscreen support

Changes:
- updated google support libraries
- updated gradle plugin
- updated build tools and target sdk
- changes in ScaleTransformer (scaleFactor)
- FullScreen mode should work with ResizeTransformer