
duration values are now plotted accurately
my thanks to John George to pointing out that
it takes time to draw the actual image on the scree
so that the wait time has to be less than the refresh
my solution was to use wait times equal to 
0.5, 1.5, 2.5, etc, times the refresh time,
so that the actual durations correspond to 1, 2, 3, etc
refresh times.



git-svn-id: 602a26e73ae9f2a14e2bb95676f2e137fcc39919@138 7c0444ca-5550-0410-9008-faecdbe78eb5

dpaiton/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,PetaVision/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV,dpaiton/OpenPV