Use MultiDexApplication
Update dependencies
Remove preDexLibraries control
Extra java sources are appended lazily
More tunings for travis
Enable gradle daemon for travis
Add installation steps to README
Support new android plugin's name
Use ProjectConfigurationException
Add long plugin id
Fix quotes
Remove proguard resources
Update sourceSet when variant is added
Update targetSdkVersion
Update sample's dependency
Prepare release gradle-android-scala-plugin-1.1