check for color before printing 'fix color' code.

otherwise you end up with the C_NORM in the output file, which
looks like nonsense.
remove some newlines that shouldn't be there.

debug stuff isnerts it automagically.  holdovers from when we
still used raw printf's.
situ: don't "launch_vis" on fclose.

oooooold holdover from when we used this to instrument the n-body
simulations.
instrument HDF5 calls.

a bit of a nightmare because the size of the buffer isn't actually
available in the 'write' call of HDF5: one has to back up a few
functions and read it back.
add start/basic enzo library.
have enzo freeprocessor write out data.

it works.  and it's very little code :-)
add example as to how to do PV in situ.

via their "catalyst" libraries.