Add a service for creating bookmarks
Add a site and a bookmark model
Add tagging to the bookmark model via rocket_tag
A bookmark belongs to a site, so setup that relationship
Add persistence to the BookmarkCreator.create method
Add a form object for creating bookmarks
Add a view for individual bookmarks
Add a view for creating a bookmark given a url and some tags
Add a view for listing all the sites with bookmarks
Add a view for showing individual sites and their listing of bookmarks