updated tests

- updated code to use Factory Girl
- removed some generated tests that do not hold true anymore
added all teams to seeds
fixed some test that where failing

- because of a unfinished factory
added membership creation of all users in seeds
fixed more test

- one still broken
Merge pull request #219 from koelncampus/add-user-management

Set all teams/memberships via seeds
corrected boolean where in seeds (postgres bla...)
fixed accociation typo in teamds
fixed tests
commented in test all working :)
removed dummy test
clenaup tests
fixed rails upgrade problem in user controller
added registration guide, see #217
Merge pull request #226 from koelncampus/register-readme

added registration guide, see #217
dynamic admin layout for all admin routes
corrected admin_layout check
removed outcommented code
Merge pull request #221 from koelncampus/fix-pending-tests

Fix pending tests / housekeeping
marked brocken test pending

- it needs a logged in user
- allready in development in antoher branch
- thus marked as pending for now