added tracker 'Track' with basic logic
basic smoothing works
implemented marker time out for tracking
fixed 'fly in' problem
trying to fix wrong orientations during smoothing
trying to fix the rotation errors with quaternions
euler, quaternions, angle-axis, slerp ... everything tested, nothing works
smoothing via euler vectors
trying to fix one last smoothing issue
found the mistake - marker points are sometimes swapped
trying out rotation fixing with least distance to origin
fixed issue with wrong marker vertex order, hence smoothing works correctly now
has a mutex problem
fixed mutex problem
fixed small issues
updated code documentation
updated to fix gcc warnings
updated README to reflect latest changes