Log Message:
Update to roundup 0.5.7.  Relevant changes:
2003-05-08 0.5.7
- fixed Interval maths (sf bug 665357)
- fixed sqlite rollback/caching bug (sf bug 689383)
- fixed rdbms table update detection logic (sf bug 703297)
- fixed detection of bad date specs (sf bug 691439)
- required String properties not being flagged (thanks Ajit George)
- only look for CSV files when importing (thanks Dan Grassi)
- can now unset values in CSV editing (sf bug 704788)
- fixed rdbms email address lookup (case insensitivity)
- email file attachments added to issue files list (sf bug 711501)
- added socket timeout to attempt to prevent stuck processes (sf bug 665487)
- email registered users shouldn't be able to log in (sf bug 714673)
- handle missing addresses on users (sf bug 724537)