Fallback to .reviewboardrc if no propset was on the svn repository
Review Request #397 — Created May 26, 2008 and discarded
This change adds a fallback for looking for the REVIEWBOARD_URL, if it's not set on with the svn propset, then we fallback to the 'regular' look for ".reviewboard" file in the parent directory structure.
tested on a subversion checkout that didn't have a property set, with this fix, if a .reviewboard is present, it correctly finds the server.
