optimization
fix in RayCast and EdgeShapes tests
temporary move step() to draw loop
optimization
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna into BOX2D_OPTIMIZATIONS

Conflicts:
	tests/tests/classes/tests/Box2DTestBet(Box2D)/Box2DView.cs

more Optimization
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna into BOX2D_OPTIMIZATIONS
m_proxies replace list to array
fixed remove fixture
remove m_test.Step(settings); into draw method for easier debugging
optimize b2BroadPhase.Compare
use array instead Stack container
inline optimization b2WorldManifold
inline optimization b2ContactSolver
fixed bags and optimization
resume optimization
debug compile fix
free stack object in b2World.Solve
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna into BOX2D_OPTIMIZATIONS

Conflicts:
	tests/tests/Resources/Resource.Designer.cs
Merge branch 'BOX2D_OPTIMIZATIONS' of https://github.com/Cocos2DXNA/cocos2d-xna into BOX2D_OPTIMIZATIONS
Merge pull request #320 from Cocos2DXNA/BOX2D_OPTIMIZATIONS

ultra high performance box2d enhancements.