fix group particle scale problem

Signed-off-by: rainfiel <rainfiel@gmail.com>
avoid particles create too much lmatrix

Signed-off-by: rainfiel <rainfiel@gmail.com>
fix file handle error
增加游戏恢复激活状态时的接口
Merge pull request #51 from keyring/master

给API文档添加目录索引
Merge branch 'master' into public