Update flexitests game model

+ Add folder's directory action (client script)
Merge branch 'master' of github.com:Heigvd/Wegas

# By Francois-Xavier Aeberhard
# Via Francois-Xavier Aeberhard
* 'master' of github.com:Heigvd/Wegas:
  Recommit all font files
  Added new wysiwyg impacts on StateMachineDescriptor and NumberDescriptor
  Added enrolement key to Game jpa entity
  Move lobby buttons to the left tab
  Fix issue in mcq entities