gstlal_inspiral: patch for gstlal-inspiral 1.4.2 - fixes bug in reconstruction segments for injections

gstlal_idq_trigger_gen: switched back block-stride in firbank to rate: 1 second chunks for each channel

gstlal_idq_trigger_gen: trigger freq band output fixed, from (rate/2,rate) to (rate/4,rate/2) where f_nyquist=rate/2

gstlal_idq_trigger_gen: fixed firbank element block stride to be duration*rate (constant) for each rate instead of rate

gstlal_idq_trigger_gen: added toggle for web services, fixed verbose output when shutting down pipeline

idq_multirate_datasource: changed method of downsampling - use cheb low pass filter + undersampler to downsample, removed parts that were specific to inspiral pipeline

ugly/gstlal_plot_channel_psd: file output names more sensible, fixed help comments to reflect changes

gstlal_idq_trigger_gen: added bottle routes, http server to produce psds, added verbose output; gstlal_plot_channel_psd: plotting utility for psd xml files

- simplify segment list collection
- fix handling of unpopulated segment list types