Merge pull request #53 from CircleBinder/to-micro-component

To micro component
EXPERIMENTAL: Fast build to dex files

Remove unused classes before dex files task
Create playground flavor
EXPERIMENTAL: Fast build to dex files

Remove unused classes before dex files task
Merge pull request #55 from CircleBinder/playground

playgoundフレーバーを用意する
Merge branch 'release-2015-winter' of github.com:CircleBinder/Android-CreationBinder into refactor-view-components