modif event model
Add german translations
Update from master
copy all lang from french to english folder
update translation of english messages to return
translate lang/en/error
translate lang/en/success messages
complete comments on eventController
Hide fields in Group model
Add all german fail
translate lang/en/fail messages
Added appends attributes on peripheral tables or unique relationships
Added missing @author in models
translate lang/en/success messages
translate lang/en/reminders
fix conflict on event model
Fixed deletion of hci and validations files
Add missing german traductions
Merge branch 'dev/master' into dev/che/tra
update
fix bug on Performer model -> getOrderAvailable