Merge pull request #298 from gena-m/master

fixed box2d tests
fixed CCTexture2D.InitWithString
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna
Merge pull request #6 from denis-minchuk/master

box2d: fixed bug in copying ChainShape
Merge branch 'master' of https://github.com/gena-m/cocos2d-xna
Added attribute Flags in CCKeyboardMode
BOX2D test support keyboard
Merge pull request #299 from gena-m/master

convert b2BodyDef and b2FixtureDef to class
Fix for #300 - added sort by reference support to b2body.
Merge pull request #301 from Cocos2DXNA/ISSUE_300

Fix for #300 - added sort by reference support to b2body.
More optimizations in the collision code and fix for sensor test.
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna
fixed friction bag
fixed b2Distance
Merge pull request #302 from Cocos2DXNA/SENSOR_TEST_FIX

Sensor test fix
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna
added memory and GC state labels