Fix SDL_GetKeyFromScancode signature.
Merge pull request #55 from IntelOrca/master

Fix SDL_GetKeyFromScancode signature.
Adding our custom changes to OpenGL which relate to framebuffers. We probably want to upstream this at some point.
Made it so that previous overloads were additional instead of replacements. Should be able to merge this upstream.
Merge pull request #57 from SeanColombo/master

Additional method signature to allow BlitFramebufferFilter enum instead of ExtFramebufferBlit enum.
Fix BlueLine merge
Updating Makefile to include ability to produce release builds.
Adding proper -optimize flag to release build make target.
Merge pull request #58 from nickgravelyn/master

Adding release build to Makefile
Fix pszGUID string parameter
Guid is a thing. Grumble.