added credits screen and made SFXManager a true singleton
Merge remote-tracking branch 'upstream/master'
GameManager setup for time tracking.

Also background addition for Victory Screen.

Falling into a pit also sends the player to the Defeat Screen.
Merge pull request #47 from LochNeffMonster/CreditsAndSingleton

Credits and singleton
added options menu
Merge pull request #49 from KeThieu/master

Small Camera Change + Energy changes for Character States
Merge pull request #48 from LochNeffMonster/OptionsMenu

Options Menu
Merge remote-tracking branch 'upstream/master'