Fixed round method, to be able to handle negative numbers.
Code review and code commented in AABB methods.
Ray collision with circles optimized. Added ray collision with polygons. Fixed jsdoc tag at GenericCollisionChecker.js
Changed keyboard event method at InputManager.js, it's more stable, for more testing platforms. Added Math test cases. Added ray collisions test cases.
Bumped to v1.1.3-alpha. Builds and API documentation compiled.