If an HDF5 file is passed to the --save option (indicated by '.hdf5' extension)
then save the data to an HDF5 file without plotting.

Functions to save/load noise traces and IFO model parameters to/from HDF5
files.  Requires the h5py module.

free up the "util" namespace for other purposes not related to noise
calculation

namespace conflict with the gwinc plot keyword argument.

automatic creation of the commad line interface script

So that distribution packages and tarballs don't misrepresent what the
project is.

fix name, version and included files

no functional change

Use the new CBCWaveform interface in the insprial_range package for specifying
the waveform and parameters, both in the CLI and test.

Use 'plot' instead of 'fig', which can be confused with matplotlib
figure.

and update README

and move to python3

This is a rote copy of the new suspQuad code in matgwinc that iterates over
the stages, and supports tapered fibers:

https://git.ligo.org/gwinc/matgwinc/commit/a59f01192a1ffc1644a45be536e31bc0eb78bd7c#9cb6e594e14c1d61dbb3c91549166a2d48db194f

This allows for setting per-stage temperature and wire and blade properties.

This version differs slightly in some generalizations about the number of
stages, although it doesn't quite yet support an arbitrary numer.