Code to support group functionality for reservations. (Done!)

[aj]

See my other post for details at:  http://php.brickhost.com/forums/index.php?topic=9638.msg16074#msg16074

Added functionality to the reservation dialog: included groups on the left had side of the dialog.  When groups are selected to be added then they are exploded to include their specific users after the "Save".

Please post any suggested optiimzation....