Switched Automaton for async/realTimeArrow

Rather than use a custom made Automaton data type for the realtime
conversion functions, we now make use of the Automaton from the arrows
package.  Note that the comments are now out of date.
Fixed Histogram Resize Issue

Fixed a bug causing histograms to display wrong with large amounts of
data.  Also, fixed a potential divide-by-zero bug in the histograms.