1. -Code clean.
1. -Do opengl operation in uninitialize instead of unload.
1. -Remove useless class TextureFragDescription.
2. -Optimize SReflectTextureInfo.
1. -Move the logic form construct function to initialize function in TextureFrag. To avoid get NULL TextureFrag in SReflectTextureInfo in multi-thread.
Merge branch 'master' of https://github.com/beyondlwm/FCEngine