Performance comparisons

[filipwasil]

The goal is to beat the cocos2dx and ogre3d engines,

Define couple of performance tests.

[filipwasil]

If we already have profiling macros, we can now make modular testing. Known test cases:

• Adding model to tree
• Adding Animation callback (or other focus callback to engine)
• Creating model from file
• First frame draw
• Second frame draw
• RAM usage
• Engine class Construction time