[Owncloud] SabreDAV

[Jakob Sack]

Hello list,

I replaced HTTP_Webdav with SabreDAV. The WebDAV part of ownCloud should work 
much better now. To tell you some advantages of SabreDAV: it is a very active 
project, the developers answer questions within hours, CalDAV and CardDAV 
support are implemented and the code ownCloud needs to use SabreDAV is very 
small.
On the downside I had to change the database layout. The tables "locks" and 
"properties" changed. If you like messing around with SQL you'll find the table 
definitions in docs/owncloud.sql, the rest of you might create a new ownCloud 
installation.
See you at Desktop Summit,

Jakob