Progressbar

Key features:
- multiple levels possible,
- indicates the time remaining (with uncertainty estimate)
- Can show a 'debug' button, to interrupt the computations and go to the MATLAB debugging environment
- can take any start/end value, not only the waitbar default range of 0 to 1

Example usage:
progressbar('start',10,'A progressbar demonstration','EstTimeLeft','on');
for k=1:10;
pause(1);
progressbar(k);
end;
progressbar('ready');

See help progressbar for all options.