Conflicts:
	common/lib/xmodule/seq_module.py
	common/lib/xmodule/xmodule/capa_module.py
	lms/djangoapps/courseware/module_render.py
	lms/djangoapps/courseware/views.py
	lms/djangoapps/multicourse/multicourse_settings.py

choice without text caused error

* Video Player now acting as a parent that always knowing the state of
  their children.
* Events on the sub-controls are now triggered on itself, and binded by
  the Video Player instead of triggering everything on the Video Player.
* A new helper class, SubView, has been introduced to cleanup repeat
  logic on scoped jQuery selector, render() and bind()