Initial project infrastructure.
Create the basic model, admin model, and views.
Modify the Catalog model to use MPTT trees for storing parent/children catalogs.
Modify the list view to only display catalogs and no products. Add templates for the list and detail views.
Fix a typo in the models file.
Add a missing import to the admin file.
Add yet another missing import to the admin file.
Fix a typo in the urls file.
Add initial model migraion.
Fix the templates to work correctly.
Add a travis configuration file.
Merge branch 'release/v0.0.1'