updated gstlal_feature_extractor + iDQ makefile with new gstlal opt build changes, added kafka proper as part of install, fixed some issues with C flags in kafka-python that caused install to fail

inspiral_lr.py: added None template_id to random_params because likelihood-ratio code requires it now

add gstlal_feature_extractor_pipe_online for online DAG submission, fixed issues with producing correct gps ranges for condor jobs in gstlal_feature_extractor_pipe

- set the threshold automatically from the extinction model

- don't need coinc_definer_row argument, just use default value.

- this program crashes if the injection file is empty.  why is it empty?  it just is, OK.  sheesh.
- this patch reworks the PSD --> GPS time mapping code so that it doesn't crash when there are no injections.  a significant amount of simplication is possible, too, and so this patch also does a buch of cleanups.
- note that this program is borken for anything other than "H1", "L1", "V1".  some generalizations are made, here, to simplify the expansion to different detector networks in the future, but I don't actually fix the lack of, e.g., KAGRA support at this time

- don't hard-code instrument list, get from PSD files
- use plotutils to convert instrument name to colour (and color)

dropped in online ranking statistic code

- Param elements now do support None, but not via the .from_pyvalue() method, yet, only via the .build() method.