eyetribe: Add draw_drift_correction_target hook
Merge remote-tracking branch 'upstream/master'
Merge pull request #25 from smathot/master

Show camera image on PyLink <= 1.0
Merge branch 'master' of github.com:smathot/pygaze
improved sampling accuracy
Merge branch 'master' of https://github.com/esdalmaijer/PyGaze
Merge remote-tracking branch 'upstream/master'