Display testcases codenames in submission results for admin.
Consistently use __future__ imports in all files

Just absolute_import, print_function and unicode_literals for now, and
exclude unicode_literals from cmscontrib, cmstaskenv and cmstestsuite.
Use proper project name in copyright notices
Fix empty __init__.py files

Remove any copyright claim and add __future__ headers.
Use io.open instead of open or codecs.open
Allow admins to limit the localizations of CWS available to users

Co-authored by Luca Wehrstedt.
Add interface for users to choose CWS localization, overriding browser

Co-authored by Luca Wehrstedt.
PEP8