tigefa4u projects Trac

Unbreak links in the namn column for files in the browser.

* browser module can now handle directory paths without a trailing slash, closes #218, #284.
* Display log-entries before a branch or tag, closes #242.
* View logs for directories as well, closes #219, #232.
* Other directory/log/file improvements.

* Don't throw an exception if we can't parse the rev parameter, closes #288
* Removed some python2.1 incompatible code from Ticket.py, closes #289.
* Learn tracd how to answer to HEAD requests.
* Make the directory browser smarter.

Reinstate a few lambda functions after bdash pointed out how they could be
made python2.1 compatible.

Let the user leave and optional one line comment when editing wiki pages. Closes #62.

* Try to convert file contents into utf8 before doing syntax highlightning.
* Add unique constraint to permission and ticket_change tables, closes #285.
* Fix the timeline rss feed, closes #281.

self.args is now a FieldStorage instance. This allows arguments to be lists.

Log attachments.

Add revision information when viewing a File. Fixes #205.

Added support attaching multiple files with the same name. TRAC_ADMIN can
now delete attachments. This should finally close #27.