Bookmark filter form
Reverse generic relations for the Bookmark model.
New manager for the Tag model. Return user tags.
Bookmarks specific CSS file.
String representation of the bookmark record (defined on its models.py)
Bookmark filtering tool. Initial implementation.
Bookmark display view working with the new bookmark query.

This new query will allow us to filter the results efficiently.
Got tags working with the new query.
Reverse generic relations for tags and notes
Tag and date filter for the bookmarks
Attach the notes and tags to the document instead of the bookmark
Solve conflicting names problem on the document models def.
Filtering working, going to merge with the main branch