Added functionality to the MainMenuState. Can go in and out of any state from the MainMenuState. Esc does not exit the program anymore. Also added in sound effect and place holder music but they are not in use.
Merge branch 'master' of https://github.com/dadamitskiy/WarInParadise

Conflicts:
	WarInParadise/WarInParadise.vcxproj.filters