refs #18 changed database configuration for development
refs #18 refactored tour signup to use new database structure
refs #18 refactored tour view and display of tour participations
refs #18 refactored tour cancel action
refs #18 refactored the export participant list action
refs #18 refactored send email to participants action
refs #18 added add action to tour participations controller
refs #18 refactored changeStatus and cancelTourParticipation actions of
tour participations controller
refs #18 added edit action to tour participations controller
refs #18 tour participation edit actions are now represented by icons
refs #18 updated change status view for tour participations

The change status view for tour participations now informs the tour guide
whether an email will be sent to the participant dependent on the presence
of an email address in the current tour participation.
The text area the allows the tour guide to enter an optional message is
only shown, when an email address is present.
refs #18 previous tour participations are now shown on the tour
participations view action if applicable
refs #18 added signup user column to tour participations on tour view
refs #18 fixed small bug when sending email on tourparticipation add
refs #18 fixed problem on tour participation view without sac membership
number
refs #18 added missing fields to tour participation

There were some fields missing from the tour participation table that were
present in the profile, but should be stored per tour participation. These
fields were added to the tour participations table.
The tour participation form as well as the tour participants export have
been adapted accordingly.
refs #18 refactored the tour signup method into the tour participations
controller
refs #18 the tour participation edit form now contains the email address
refs #18 adapted the tour overview statistic
refs #18 updated tour statistic report

also reverted a small change in the style sheet (infoitem margin was reset
to 10px)