-Restructured music system so that boss music actually changes up instead of playing the same song on a handle-controlled, looping timer.
-Request: Move RoundStartPost code to ArenaRoundStart Event.
-Request: added optional for boss coders to have their Minion Boss take damage when the minions take damage.
-patched VSHGameMode::UpdateBossHealth so that it calculates multiboss health excluding dead bosses.
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