matgraph_version

function v = matgraph_version
% Report which version of MATGRAPH is being used.
%
% The output is a character string; if you want a number, type this:
%     str2double(matgraph_version)
%
% This isn't very important, but it's useful to check which verision you 
% have installed on your system. Knowing the author of this software, 
% there's a chance this might not be up to date. 

v = '2.0';