Ticket #263: Schema changes.
Ticket #263: Made required guacamole-ext changes.
Ticket #263: Added EXECUTE permission to connection permission enum.
Ticket #263: Refined guacamole-ext.
Ticket #263: Improved guacamole-ext and added ConnectionGroup mapper.
Ticker #263: Set up dependency injection for ConnectionGroupService.
Ticket #263: Clarified permissioning.
Ticket #263: More querying.
Ticket #263: Connections and groups should be unique only within the parent group.
Ticket #263: More work on connection groups.
Ticket #263: .
Ticket #263: Finalizing changes.
Ticket #263: You need READ to be able to connect to a group.
Ticket #263: Switched to enum for connection group type.
Ticket #263: Fixed permissions to use identifiers instead of names.
Ticket #263: Added parentID for created connections and groups.
Ticket #263: Refactored ActiveConnectionMap and added group load balancing.
Ticket #263: Changed name to activeConnectionMap.
Ticket #263: Fixed a couple of bugs after testing.
Ticket #263: Changes in response to code review.