Audio and GameMaster changes

Added SFX and Music to the game. Changed a few things related to the
GameMaster. Added some transition states, and made the state variable
only readable.
Merge branch 'Splash-SFX-and-Music' into development
Background speed adjustment

Reduced the background speed
Changed obstacles to “IsTrigger”
Merge branch 'Tweaks-And-Adjustments' into development
Merge branch 'development' of https://github.com/DadiuTeamOne/Blue into development