Bump to 2.9.0~pre19
Fix a bug in inline_script items without symbols in tree
Don't change experiment path when creating backup
Update debian/changelog
Fix regression where noise_patch() and gabor() didn't work for xpyriment canvas (closes #278)
Update quest plug-ins
- Use reset() to initialize variables
- Use yamldoc docstrings
- Only process responses that can be converted to float (closes #279)
Close item tab when permanently deleted
Bump to 2.9.0~pre20