Add dreamer-sim-chisel binary

This is a DREAMER simulator that takes the output from Chisel, puts it
in dataflow order, and then simulates it for a while.  The general
idea is that I want to simulate this output format to ensure that the
Chisel backend for DREAMER isn't broken.

There currently isn't any actual simulation going on, this is more of
just a checkin of the test case and such.