• Added: RFC5689 - Extended MKCOL support.
• Fixed: Evolution support for CalDAV.
• Fixed: PDO-locks backend was pretty much completely broken. This is 100%
  unittested now.
• Added: support for ctags.
• Fixed: Comma's between HTTP methods in 'Allow' method.
• Changed: default argument for Sabre_DAV_Locks_Backend_FS. This means a
  datadirectory must always be specified from now on.
• Changed: Moved Sabre_DAV_Server::parseProps to
  Sabre_DAV_XMLUtil::parseProperties.
• Changed: Sabre_DAV_IDirectory is now Sabre_DAV_ICollection.
• Changed: Sabre_DAV_Exception_PermissionDenied is now
  Sabre_DAV_Exception_Forbidden.
• Changed: Sabre_CalDAV_ICalendarCollection is removed.
• Added: Sabre_DAV_IExtendedCollection.
• Added: Many more unittests.
• Added: support for calendar-timezone property.