stats plugin: isolate stats events and mix in a container when necessary
core: restore function to load another video in the same player instance
media control: add support for stacking buttons on the left and right portions of the bar
media control: fix css for play, pause and stop buttons (closes #33)
media control: add toggle buttons (play/pause, play/stop) support (closes #35)
core: add toggle fullscreen and improved css handling on fullscreen (refs #3)
container: closes #34
media control: fix blinking issue (closes #37)