loader: remove outdated comment
loader: remove dead code :skull:
Browser: add isMobile (refs #22)

From http://stackoverflow.com/questions/3514784/what-is-the-best-way-to-detect-a-handheld-device-in-jquery
html5_video: Try to play sources using <video> tag on mobile devices
html5_video: initial support for mobile devices
flash_vod: refactory pill :pill: