fps monitoring

[straszheim]

want to know if we're operating at camera speed

may want to instrument things in other ways... where are the hotspots, Hz rate for individual nodes... try to be flexible

FOR MOLD SPORE:

simply be able to demonstrate that we're running at camera speed

[straszheim]

replaced with #36 for demo purposes.

Added assorted instrumentation using TSC timer as a starting point for future profiling/optimization, in 1a4cb70