Add HLS Support

[brimanning]

Currently simplevideo only supports mp4 playback.

[brimanning]

Some good references:

• http://www.digitalprimates.net/author/nweber/2012/08/22/playing-hls-video-in-flash/
• https://code.google.com/p/apple-http-osmf/
• https://github.com/nweber/hls-as