Tests -- Reformatted imports.
Tests -- Updated test_views.py to current state. Related to #124.
Mixed -- Related to #124 and #123.

Added get_root_category() to Settype model. Added get_set_type() and get_set_type_slug() to Set model. Added template_conf field to Set model.
Set types -- Added migration for newly added template_conf field on Set model
Tests -- Updated tests to pass. Resolved #124.
Template tags -- Updated code that evaluates back base state.

With the new system using the set type slug as application instance namespace the code had to be updated to use the correct variable name cat_set_type. Additionally, instead of populating the variable with a try/except blog it now just uses the get_root() method provided by treebeard to get to the slug value.