Renamed gl_alias to engine_alias.
Added .gitmodules file.

Includes ProjectAdamas and DetectiveS.
Update .gitmodules
Merge branch 'unstable' of https://github.com/OldTimes-Software/ProjectKatana into unstable
Boolean and integer data types for console variables.
Replaced some OpenGL calls.
Added SDL2 Mixer library.
Revised header includes.
Minor revisions...
Logs are now automatically store in engine/logs.
Shading is now enabled for old model renderer.
Delete engine.x64.so
Delete Level.x64
Delete Launcher.x64
Fixed issue with doors/buttons that don't return.
Added OpenKatana source.
Merge branch 'unstable' of https://hogsy@github.com/OldTimes-Software/ProjectKatana.git
Fixed new model rendering pipe; vertices are no longer skipped.
Added support for BSP4 format (remember to recompile your old bsp levels).
Screenshots are now saved correctly.
Switched everything over to use the new shared structs.
Added some small additions. Updated most OPENKATANA defines to use GAME_OPENKATANA instead, while adding some new GAME_ADAMAS defines too.