• The zip release ships with sabre/vobject 2.0.5.
• Added: ACL plugin advertises support for 'calendarserver-principal-
  property-search'.
• Fixed: [#153] Allowing for relative http principals in iMip requests.
• Added: Support for cs:first-name and cs:last-name properties in sharing
  invites.
• Fixed: Made a bunch of properties protected, where they were private before.
• Added: Some non-standard properties for sharing to improve compatibility.
• Fixed: some bugfixes in postgres sql script.
• Fixed: When requesting some properties using PROPFIND, they could show up as
  both '200 Ok' and '403 Forbidden'.
• Fixed: calendar-proxy principals were not checked for deeper principal
  membership than 1 level.
• Fixed: setGroupMemberSet argument now correctly receives relative principal
  urls, instead of the absolute ones.
• Fixed: Server class will filter out any bonus properties if any extra were
  returned. This means the implementor of the IProperty class can be a bit
  lazier when implementing. Note: bug numbers after this line refer to Google
  Code tickets. We're using github now.