Release 3

Merge pull request #19 from oomek/pr-drm-triplebuffering

Added triple buffering to DRM backend

Release 2

R2

Merge branch 'Ravirael-merge-with-sfml'

Release 1

[rpi] Fixes for input handling

- realtime input functions should work properly now (isKeyPressed(), etc)
- Window pollEvent() should always get waiting events now