CHANGES for 2.7.1
-Quick rollback of a file now that PlayMusic is working again
-Updated Both TOC files so the addon is not "Out of Date"
*This was a quick update. Still requests for fixes and updates will come.

CHANGES for 2.7
-Fixed Interface problem that wasn't working
-Added Legion Default Music
-Using the Temporary Fix for PlayMusic - Thank you NovaClaft for your input
(note that the SoundEffect will overlap World Music, however all other Music Events will end the current sound effect playing. And only 1 sound effect can be playing at a time) I can only suggest the use of shorter SoundEffect, example a short victory sound.

I of course have not tested everything on this. There will be issues, however it's functional.

Future:
+Add Demon Hunter to Misc Tab
+Get PlayMusic back on once Blizzard fixes this
+Review any issues that I can tweak until then (feedback is apperciated)

Enjoy the workaround for now.
Thanks for your patience. 

