Removed TODO around fullscreen vs windowed, as we will always be fullscreen, albeit not with the 'setFullScreen' function, as on some devices, this puts the video in front of the UI
Renaming cehtml.js to cehtmlcommontests.js in preparation of changing them to mixins as per html5
Converted CEHTML tests to mixins that will be common to the base CEHTML modifier and sub-modifiers