Cleanup before working on nested sets.

Signed-off-by: Tom Green <kingofcuddles@gmail.com>
more cleaning up

Signed-off-by: Tom Green <kingofcuddles@gmail.com>
Added in new nested set migrations

Signed-off-by: Tom Green <kingofcuddles@gmail.com>
Worked on the nested set models.

Signed-off-by: Tom Green <kingofcuddles@gmail.com>