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

- instead of relying on gethostname() to return a resolvable name, grab the IP address from the incoming request so that the address we put in the links in index.html is certain to allow the client to retrieve those documents

- more alphabetization of dependency lists
- add missing gir1.2-glib-2.0
- add other missing deps to gstlal-calibration
- remove libxml2 dependency (why was this added?)

- http server should be started on 0.0.0.0 (= all interfaces), and avahi should advertise it on all attached networks for us, so there's no sense in which any server address other than 0.0.0.0 is correct

- rely on it retrieving the default bottle app instead of passing it

- remove job tag from advertised service name
- use default port number (= randomly assigned)
- add line breaks to organize code