Multitrack audio video text rebased
Created by: dsparacio
This is a PR that includes all of PR #662, as well as the new multi text track support rebased on the current dev branch as of this morning.
There was one conflict that caused multi text support to fail
b6fd76be0c945becace36c837d3e3adae5cafe0b
so I reverted one line of code of which the resolution is being actively discussed
0355ce7f & #690.
@bbcrddave now we can fix this on top of the multi track work....
I will be mounting a version of our support player using video.js with mutli-text-track samples that will demo both external xml and fragmented text tracks. It can be found here: http://mediapm.edgesuite.net/dash/private/support-player/nightly/v1.5/index.html
Once merged, I will submit another PR with a simple HTML sample as well as update the ref player index.html
PS The above demo url may not be up until later tonight or in morning.