Improve Flexitest CSV export

Mainly for excel
Merge branch 'master' of github.com:Heigvd/Wegas

# By Francois-Xavier Aeberhard
# Via Francois-Xavier Aeberhard
* 'master' of github.com:Heigvd/Wegas:
  Fix #557
  Fix #463
  Fix #597
  Fix #605
  Fix game informatin layout
  Refactor game access in lobby
  Fix margin in lobby
  PMG - Added test script for simple pmg
  Add home page to PMG
  Review wegas-console
  Add back button to public game join page