removed code commented out.
removed a debug output.
try to get the group name from the name server when is not avaible from s_group; changed the use of lists:sort to list:usort.
syntax error fix.
added function 'new_s_group'.
functions added for helping the dynamic creation/removing of s_groups.
functions added for dynamic removing of a s_group.
functions for dynamic adding nodes to a s_group added.