Background music added

Review Request #129312 - Created Nov. 2, 2016 and discarded - Latest diff uploaded

Divyam Madaan
  1. The background music doesn't play on the same instance when we download the music though it gets registered and also works good if automatic update is enabled.
  2. We unregister the background music (similar to wordset) evertime when we close the main configuration box and register it again. If we don't have any updates (no changes in what is existing), is it required and necessary to do it?

music plays after the welcome message in all cases (when audio effects enabled and when audio effects disabled but audio voices anabled) and seems good.