Do not create empty RunSession. Only save what's needed.
Only create necessary RunSession on WeeklyReport
Create a RunSession when saving a GarminActivity.
Use get_dated_sessions in views.
Finally, just annotate the nb of sessions per report in the club member page.
Sort members by name and date of last session, in both orders.
Excel export & mail to trainer now uses dated report sessions.
Fix minor bug in month links display.
Select a club when a user register. Add main_trainer on club.
Display trainer name on member page.
Display count of sessions per members in club list.