Add FrameClock and ClockHud classes.
Combine FrameClock and ClockHUD into one class called StatManager
Add commands functionality

Created a base command class, A player class that handles user input and a CommandQueue class that
dispatches commands to all the nodes in the SceneGraph using categories.
Add title screen and change some settings in pony-game-main
Create state stack class that handles the different states of the game and chaging between them
Fix flickering text effect in Title Screen