Zope CMF BitTorrent Tracker Code

rename

update product name

* use a before traverse hook to disable CookieCrumbler
* stores torrents path in the dict, not torrent directly

define a custom permission

rename portal_tracker as portal_bttracker, use constants for Permissions instead of strings, implements a bit of authentication

remove unused workflow methods; store username, not user object

clean up the code

remove tabs

Improve codestyle (thx to pylint)
Initial work on http authentication for clients (not functional yet)

improve skins