function?progressbar（varargin）
%?Description:
%???progressbar（）?provides?an?indication?of?the?progress?of?some?task?using
%?graphics?and?text.?Calling?progressbar?repeatedly?will?update?the?figure?and
%?automatically?estimate?the?amount?of?time?remaining.
%???This?implementation?of?progressbar?is?intended?to?be?extremely?simple?to?use
%?while?providing?a?high?quality?user?experience.
%
%?Features:
%???-?Can?add?progressbar?to?existing?m-files?with?a?single?line?of?code.
%???-?Supports?multiple?bars?in?one?figure?to?show?progress?of?nested?loops.
%???-?Optional?labels?on?bars.
%???-?Figure?closes?automatically?when?task?is?complete.
%???-?Only?one?figure?can?exist?so?old?figures?don‘t?clutter?the?desktop.
%???-?Remaining?time?estimate?is?accurate?even?if?the?figure?gets?closed