unload for ppm
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
增加是否启用屏幕内可见判断的接口
Merge branch 'master' of ssh://oa.ejoy.com/ejoy2d
add draw call statistics
add on_puase callback
Merge pull request #1 from cloudwu/master

合并作者仓库修改