Added Youtube into MediaCenterJS

Please please please verify changes on files other than things in the youtube folder (You can look at those too of course).

I have synced from the original repo several times to keep up with changes and fixed merge conflicts as much as possible!

Let me know if I need to make more adjustments so we can integrate this properly!

If there are additions requested, I would love to hear them. 
Also, I have enhancements starts over on my fork and i'll continue to get to them when I can.

Thank you! :D