GUI: allow multiple update on addMemberToGroup

 - do not exit tab when member added to group (show added members)
 - use ExtendedTextBox for app form item ShortName
 - fixed copyright date to 2014
GUI: use full object when add/remove group member

 - use RichMember and Group objects for callbacks
 in order to display names in result message.
 - removed Window.alert() from checks in callbacks
Merge pull request #96 from zlamalp/devel

GUI: fixed case of adding multiple members to group