Music should not restart on each Continue

[knowknowledge]

Currently, the Music starts when the game starts running.

The Music should either pause when in the Main Menu, or it should continue at the same place.

This probably means changing the Music class. The Simulation may want to send a Pause command when it leaves the Run Loop.

A quick fix would be to just move the "bgmusic->Play()" to the Simulation's SetupToRun? rather than Run.