% Purpose
%    gets the name of a global attribute
%
% Synopsis
%    attname = mexeps('attname',ith)
%
% Description
%    It returns the name of the ith global attritube.  
%
% Examples
%    Get the first attribute name.
%
%      attname = mexeps('attname',1);
%
% See Also
%    getattnum, getattval, putattval, delatt
%