ModelCompiler to build individual, or all, model files into sgm format.
Silence compile errors.
Fix some type conversion/mismatch warnings.
Remove the option to disable compressing textures from the options screen.
Warning player if their GPU/driver does not support the necessary compressed texture formats (Linux/S3TC/DXTn).
Made InPlace optional for the batch mode.
Fix the Linux makefile.am and modify modelcompiler to only redirect stdio when doing something useful.
Merge pull request #2962 from fluffyfreak/sgmload

Support SGM files, disable texture options, new modelcompiler tool