WL-3065 Remove oxford WebDAV instructions as unneeded.

The webdav instructions aren't needed and so can be removed. This cleanup happened because we had an old email address in the instructions.
I successfully connected to a Sakai WebDAV share using Windows XP SP2 with a username containing a @ character.
Merge pull request #13 from ox-it/WL-3065

WL-3065 Remove oxford WebDAV instructions as unneeded.