• Fixed: Issue 123: Added workaround for Windows 7 UNLOCK bug.
• Fixed: datatype of lastmodified field in mysql.calendars.sql. Please change
  the DATETIME field to an INT to ensure this field will work correctly.
• Change: Sabre_DAV_Property_Principal is now renamed to
  Sabre_DAVACL_Property_Principal.
• Added: API level support for ACL HTTP method.
• Fixed: Bug in serializing {DAV:}acl property.
• Added: deserializer for {DAV:}resourcetype property.
• Added: deserializer for {DAV:}acl property.
• Added: deserializer for {DAV:}principal property.