Built-in Workflows are created by listening to a signal which is sent after syncdb.
Move builtin groups to a signal.
Add new TestCase class in utils to call the signal on running every test.
Fix PEP8, and forgotten import change. Update .travis.
Merge pull request #562 from normanjaeckel/Listen_To_Syncdb

Builtin Workflows and Groups are now created by listening to a signal