new plot to track # of FEBs with high rates
Make 14 plots (one per diblock) where the Y-axis is a unique FEB # (something like (dcm-1)*64+feb) and the X-axis is UTC time. The Z-axis will be the "current" hit rate for each FEB. This will be tricky to do making sure that we never get a hit rate that is "bad" (as in it only represents a few minutes of data.) This also might have to be the first histogram maker that is not a summary subscriber (but is a ticker subscriber instead.) An alternative for the Z axis would be a count of the number of "high rate" FEBs if we made these plots by DCM...