* [Virtual Attendants/Snippets/Placeholders] Implemented a new 'xml_decode()' function for placeholder scripts.  This converts an XML string into an associative array of nested nodes.  Attributes can also be accessed through an '@attributes' key on any node.  Check the Cerb docs for more details.
* [Web-API/Tickets] Ticket records can be filtered using 'group_id' and 'bucket_id' in the Web-API.
Merge branch '6.5.3' into stable