Modified Sprite class:
- modified velocity calculation
- modified movement direction tracking

Fixed testlevel generation to work on any resolution.

Added 1366x768 resolution.
Started development of GameAction and InputManager
Added InputManager and GameAction classes.
Modified Game to work with the newly added classes ( needs testing )
Working on Game class to implement input
Small modification to Sprite class to allow diagonal movement
Modified run() method in Game.java for improved performance and functionality.