Worklist -> database

Read up on relationships in database tables and implemented worklists
as a many-to-many relationship between users and templates.  This has
been refactored and replaces the old Sessions-based implementation of
worklists.  This has been tested and should be merged back into the
main branch soon.
Partial implementation of things remaining

- Checkbox add-to-worklist working
- Login flow mostly implemented
- Nav links mostly added.  User profile remains
- Final signer field shows up for "admin" users
- User levels added to db
Small implementation changes

Fixed small bugs needed to install on another computer
Merge branch 'worklist'