Merge pull request #45 from deini/dev

Implemented playNext() and playPrev()
Fixed styling in search.html
Merge pull request #49 from nickescallon/dev

Fixed https://github.com/ammoio/ammo/issues/46
Change youtube search category to music only
Merged from upstream dev
Merge pull request #50 from malucky/dev

Added queue button in search.html to bring back to home. Specified music category for youtube search.
You can now add duplicate items to a queue
Merge pull request #53 from nickescallon/dev

You can now add duplicate items to a queue https://github.com/ammoio/ammo/issues/48