Add --start-clean option
Provide index information when form geometry cannot be validated.
Bump to 2.8.2~pre2
Convert unicode filenames to str in sampler back-end (closes #244)
First steps of multiprocessing on OSX
Reenabled psychopy backend for OS X

Conflicts:
	openexp/backend_info.py
Updated py2app setup script
Update debian/changelog
Merge branch 'playground' of https://github.com/smathot/OpenSesame into playground
Fix autosave folder dialog OSX
Merge branch 'playground' of https://github.com/smathot/OpenSesame into playground
Update debian/changelog