repair some studio projects' bugs,depends coco's update
remove no used Comet.png
modify closecallback func, and demogame's readme
repair demogame and samplecollision closecallback func
repair sampleparticle closecallbackfunc
deleted some uselss code
add collision function back
SampleFlashImport: add sample fla
DemoCowboy: fix window size for win32
Merge pull request #42 from geron-cn/master

 repair some cocostudio's test Projs, depends on cocos2d-x's update