Replace Entries by a Setup, with an optional name
Update tests: Entries -> Setup
Add check for illegal chars in setup name
Add session handling
Launch the Referee after the session initialization
Improve debug logging
Adapt test_crash to sessions
Fixing build (flakke8, py33)
string.letters -> string.ascii_letters
Updating test_changes with sessions
Replace 'basestring' by 'str' for Python 3 compatibility
Merge branch 'sessions' into develop