Merge pull request #116 from dariomanesku/master

Lod parameter for imguiImage() and create/set font support for imgui.
DX9: Fixed texture lod.
Initial compute support.
Added 32-bit texture formats.
Removed need for varying.def semicolont terminator.
Android: Fixed missing link dependencies when building shared library.
GLES3.1: Fixed getting compute shader active uniform information.
Cleanup.
Added RG8 texture format.
Cleanup.
Updated README.
Added caps info for all texture formats.
Fixed preprocessor bug that trucnates macro arguments to first character when concatenating them.
Fixed issue#123
Added intel fragment shader ordering.
Cleanup.
Cleanup.
Updated README.
Updated README.
Updated premake script.