Log Message:
update roundup to 0.70

changes (among many others):

- added postgresql backend
- trackers using postgresql or mysql backends may have many users
- new "actor" automatic property (user who caused the last \ 
"activity")
- RDBMS backends have data typed columns and indexes on several columns
- registration may be concluded by replying to the confirmation email
- HTML templating permission checks are greatly simplified
- database exports now include full journals

For a complete list see:
http://roundup.sourceforge.net/doc-0.7/whatsnew-0.7.html