remove gstlal_ll_inspiral_state from gstlal-ugly as gstlal_ll_inspiral_aggregator can now handle state aggregation as well

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

etg -> feature_extractor: the great migration. purged all mentions of ETG and replaced them with feature extractor or more aptly name depending on context

added gstlal_etg_whitener_check exec to check output from whitener, changed Makefile.am to reflect this

committed with permission)

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

With the upgrade of matplotlib on the reference OSes to versions that
support gridspec, this program now works out of the box.