Update linux project file
Added Lua stack stuff
Revert to cd1ff37. Have to overthink my lua idea.
Fixed merge conflict
Merge remote-tracking branch 'upstream/dev' into dev
Replace OIS with SDL2.
Change input API to use SDL2 enums.
Add override keyword to MusicStream classes.
Merge branch 'dev' of https://github.com/Ponykart/PonyKart into dev
Moved OpenAL extensions into ponykart++.
Fix typo.
Convert window/context creation and main game loop to use SDL2.
Broken temporary commit - DOESN'T BUILD
Merge pull request #12 from Destineer/dev

Finished SDL2 conversion. Will NOT build correctly on Windows.
Fixes Windows premake and build errors
Implement sdl timer for tenth-of-a-second events.
Fix vsync fallback error checking.
Merge branch 'dev' of https://github.com/Ponykart/PonyKart into dev
Set GL attributes before creating window.
Moved input related files into separate folder.
Flesh out input API.