users_controller, test if user is valid, Mantis 26693
Merge branch 'V2_4' of github.com:afimb/chouette2 into V2_4
add confirmation message. Mantis 25468
fix translation. Mantis 26692
useless view, provided by user_interface gem
fix Chouette link. Mantis 26513
correct broken links in help pages, Mantis 26690
add last changes on java
merge V2_4
correct spec failure on timetables