interval in addition to the injection filename, so that said injections are
only searched for by jobs which have templates within the specified chirpmass
interval

by prog will now be stored in prog/XXXXX/YYYY, where XXXXX are the first 5
digits of the GPS time and YYYY is the mass bin.

- 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