- remove checks from configure and dependency from packaging scripts

- replace reference to pylal's documentation with reference to lal's

- use the pointer targets instead

- correct copyright notice

- ln L PDF and CDF plots when no results database has been loaded

- remove ifo_snr keyword argument, code already had sngls
- add special case for a sngls list with just one entry to reproduce behaviour of ifo_snr keyword parameter
- generalize to 1D case
- indicate horizon distance ratio in figure title
- also, correct the first argument in the call to this function from lvalert_background_plotter

- this code uses double quotes for strings
- adjust whitespace

- to return the BinnedArray version of the PDF

- ylo and yhi are in axes co-ordinates, not data co-ordinates
- and the default is to draw from top to bottom so no need to set them at all

- with (the default limits in) other codes that generate such plots

- don't know why, but I was asked to do this for another package and
  thought I might as well do it here while I'm at it.

gstlal_inspiral_plotsummary: get rid of txt files, replace with json, and speed up injection query that I got tired of waiting for