Initial implementation of a Kalman filtering
Playing nice with Unity, and cleanup
Fixed tab/space formatting
Updated C# SDK
Switch in between the two eye position

Still work to do, maybe that a mix should be done matricially in between
the two positions..
Merge remote-tracking branch 'upstream/master' into head_pose_filtering

Conflicts:
	Assets/Scripts/GazeCamera.cs
Bugfix, but the filtering is not very conclusive.

Filtering is not really robust to glitches. Should also be built in the
gaze validator class
Cleanup...
Working example, but depth can still be an issue
Now with the files....
Commiting from windows is still a mess for me..
Last minute bugfix... better with the dlls
Initial commit for a nice trail following the point of gaze
Fixed boundaries for the user distance, and initial implementation of a
particle trail following the gaze (broken as of now)
broken as of now
Now with a trail behind the gaze :)
cleanup
removing duplicates
changed the trail length, just one line..
Now with a skybox (for Henrik..) and a triggered trail (select T). Bugfix to trigger the filter (F) once per keypress