Initial work on multithreading
Work on refactoring textures
Update GUI code
Fix some memory bugs
Remove timer
Disable GUI until it is working again
Fix errors from heightmap
Fix double-swap when framebuffer mode is off
Forgot to set target for cube textures
Skybox drawing, progress!
Annotate glfw calls with thread safety
Fix GUI
Switch to SDL
User input now working
Fix segfault when pressing ? for controls
Fix crash on close
Add name to SDL timer
Fix heightmap
Shut down polling timer on shutdown
Refactor messages to ilG_renderer and fix lights