Add optional 'write to author' links for nodes/comments (modified patch by jik)
other minor code updates/cleanup

- Theme system updates: theme() function return their data now.

Patch by Craig Courtney (thanks!)

- updated to latest cvs, should work in Drupal 4.2
- added folders, you can move messages in folders, empty folders
- mail once per day if you have unread messages (user option)
- message pruning (move old messages to another table)
- list of contacts: it's built automatically looking at users you write to
- theme()ized
- if you are updating run you just need to run privatemsg.sql

- Updated the private message module to CVS.  Patch by John Cappiello.