gstlal-calibration:  lal_smoothkappas:  fix treatment of gaps. The smoothed kappas on the outbuf remain constant if there is a gap in the inbuf.

- other stuff we depend on already depends on it, but better to be clear about this just in case.

gstlal-calibration:  lal_smoothkappas: New element that uses a simlper method to smooth calibration factors

gstlal-calibration: replaced gst_audio_info_from_caps() with gstlal_audio_info_from_caps() in all calibration elements. Added transform_caps() to lal_smoothcalibfactors. Changed complex_division() in calibration_parts.py.

Adding a Makefile and plotting script to gstlal-calibration/tests. These implement the GDS calibration pipeline on Hanford data from ER9, then produce plots comparing against CALCS.

- the 2 byte class number has been split into a 1 byte checksum type and a 1 byte class number

- increase minimum required version to 0.99.6 in other packages

- and also wait until the units are known before setting the PSD

- force work space reset when units change
- in gstreamer < 1.x, stream format information arrived with the first data buffer, after the stream tag event, so we knew the sample units before we learned the sample rate (and thus nyquist frequency)
- now in 1.x the stream format arrives in a caps event before anything else, so we learn the PSD frequency resolution and Nyquist before learning the stream sample units, which causes some use cases of this element to configure it with a dimensionless PSD
- by adding the psd-units property, we can inform applications when the units become known, and allow them to defer installing a fixed PSD until that time.

- the gsl packages have been renamed in newer Debians

- still no CRC checks, though.

- in generate_template() we used to have to convert the swig fseries object
  to a pylal fseries object.  we don't have to do that anymore but the
  conversion code was still there.  remove

- add the LL job ID to the title displayed on the index.html page

- not allowed in C, gcc used to allow, now it doesn't