Bobg is working on most of this set of tasks:

get rid of ufile, review tables (I see unique constraints on columns that can take null), use cascades to remove uploads, ...

Specifically:

• Remove ufiles in database
• Migrate to using nested sets
• Change most of the UI code so that it uses these new fields
• Change unpack agent to use the new nested sets
• Modify scheduler.conf (sqlagent goes away, new agent)
• Changing the schema in the init plugin to upgrade an existing installation
• Update developer documentation
• Update user documentation