Fixes #140 import sac members
Fixes #345 manage tours for tourleaders by tourchief
Fixes #353 tour participations search enhancement
Fixes #245 tour group colours in calender
Fixes #346 adjacent tours and appointments
Fixes #356 some inactive fields in edit mode
Fixes #185 change tourguide action
Fixes #357 view birthdate in tour participation
fixes #356; merged development branch into integration
refs #357; removed an unnecessary if statement
fixes #357; merged development branch into integration
Merge branch '357_view_birthdate_in_tour_participation' into integration
refs #353; refactored the three separate queries into one query and moved
the business logic into the model
fixes #353; merged development branch into integration
refs #346; fixed some small formatting issues
fixes #346; merged development branch into integration
Merge branch '346_adjacent_tours_with_appointments' into integration
refs #345; removes unnecessary authorization check
fixes #345; merged development branch into integration
fixes #245; merged development branch into integration
refs #185; added functionality to inform tour guides and/or participants
about tour guide changes
fixes #185; merged development branch into integration