Convert strings to Unicode in config
Update translations and add French translation
Update French translation
(Hopefully) fix UnicodeDecodeError in tempfile (#181)
Consistently use Unicode in form widgets
Bump to 0.27.3~pre3
Fix erratic behavior of checkbox widgets (#185)
Fix initial status for checkbox widget
Bump to 0.27.3
Update Windows installer script
Cleaning run code

Implemented runner objects for the various ways to run an experiment
Finetuning of the new runner implementations

Exceptions from multiprocess now appropriately handled (but requires
further testing!!!)
Inprocess and external runners now also work correctly
Add Chinese translation. Not yet functional due to #192.
Make sure that `item_type` is Unicode
Various Unicodification changes
Fix missing wildcards in zh_CN.ts (#192)
Bump to 0.27.4~pre1
Minor fixes to French translation
Merge branch 'playground' into multiprocess
Merge remote-tracking branch 'dschreij/multiprocess' into multiprocess