Added rudimentary implementation for point bookkeeping.
Refactoring to minimize bulk.
Continued with group statistics calculation.

In addition to points, there is now also goals for and goals against
calculation and goal difference. Also, teams are now also sorted
by points in descending order. No other sort criteria are now
taken into account so the order of teams is approximate.
Merge branch 'feature/calcpoints' into develop
Merge branch 'release/first_release'

Publishing the changes after the first period of work with feature branches.
OK, there was just one feature branch. Anyhow, at this point I basically
want master to be the same as develop most of the time.
Merge tag 'first_release' into develop

No tags needed at this point.
Merge branch 'release/first_release_for_real'
Merge tag 'first_release_for_real' into develop

No tags needed at this point.
Fixed a wrong redirect and improved labels on an edit form.
Merge branch 'release/first-release'