This directory contains the basic definition for the Instrument class,
as well as some parameter #defines (in the *.h files) that may need
to be overridden if you do some extreme stuff (like reference filenames
with "rtinput()" that are longer than 1024 characters).  Check out
"Instrument.h" for a listing of the included variables with every
RTcmix instrument, such as "nsamps", "cursamp", etc.

The heap/ subdir contains the class definitions for the RT scheduling
algorithm we use.  The algorithm is used in ../Minc/intraverse.C and
../Minc/traverse.C ("intraverse" for interactive mode).
