Merge pull request #295 from Cocos2DXNA/BOX2D_OPTIMIZATIONS

Optimizations from Denis Minchuk and from the VS analyzer.
box2d changes
box2d tests changes
Merge pull request #1 from denis-minchuk/master

box2d changes and box2dtests added
don't reload raw assets
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna
reordered tests
Merge pull request #2 from denis-minchuk/master

reordered tests
separation Draw and Step
Merge branch 'master' of https://github.com/gena-m/cocos2d-xna
removed c++ formats
Merge pull request #3 from denis-minchuk/master

removed c++ formats
removed missed formats
Merge pull request #4 from denis-minchuk/master

removed missed formats
Merge pull request #296 from gena-m/master

box2d and box2d Tests
box2d optimization
Merge pull request #297 from gena-m/master

box2d optimization
added missing file
fix android tests build.
build error fix for the tests.