Let django auth take precedence over phpbb auth to allow admin login
Player: Move campaign data to intermediate class, rebuild migrations

Turn the FK-relationship to Campaign into a ManyToManyField with a
custom intermediate class/table (CampaignParticipation).

This way we can store the relevant data for many campaigns and
an easier way to access campaign<->player, even so the information
is not fully normalized now.

Rebuild the migrations.
Dev Environment: Add django-pdb
Dev Environment: Add django-debug-toolbar
Add a basic /abc/profile view

It displays the Players name and the campaigns