Created a backend system for the window-input management. So now it will be a los easier to port to another windows library/platform.
Since this is a big commit, it's probably that some bugs where introduced, but i tested all that i could, and it's working fine.
I'll probably add a cursor manager backend because right now there is no cursor management at all, i removed the CreateCursor function because it was unusable.
Added some functions for tex env managing.
Modified some enum names from renders.
Added a pixel separator for characters in the ttf creation ( optional ).
Moved some OpenGL and GLEW things to cGL, this is for a future implementation with OpenGL ES and without GLEW.
Tryed to fix a bad rendering bug when clipping controls with borders ( borders disappear ), i think that the hack is working.
Modified some name conventions.
Fixed shader reloading.
Added pack loading for shaders.
Added support for direct loading of compressed textures ( direct upload to vram ).
Added cImage class.
