Add ButterKnife as dependency in sample project.
Use ButterKnife library in VideoRenderer to mapGUI and hookListeners
Use ButterKnife library in LiveVideoRenderer to mapGUI and hookListeners.
Add Dagger dependency to sample pom.xml
Crate main dagger provisioning classes like MainModule and SampleApplication class to initialize injection.
Modify sample code to use Dagger dependency injection instead of create all the renderer dependencies in MainActivity.
Update README.md with the new sample code.