gstlal_idq_trigger_gen: fixed issue with reindexing when not using live data, fixed dataframe-type trigger saving to string issue when moving to new agg dir epoch

gstlal_idq_trigger_gen: added option to read triggers to disk from dataframe (new) or from string, fixed bug for missing triggers 10s after aggregator directory change

fixed bug of not being able to write triggers after aggregator dir change, added better error handling, added fixme and workaround on a bug that causes missing triggers 10s before and after aggregator dir chance

gstlal_idq_trigger_gen: added workaround for hdf writing causing program crash in rare edge cases, added comments, cosmetic changes

gstlal_idq_trigger_gen: fixed issue with dataframe indices not being set correctly, fixed edge case issues in dataframes (nan values, indexing issues) where program would crash

gstlal_idq_trigger_gen: cleaned up idq trigger generation code, fixed bug where triggers up to 1st cadence were not being written to file

gstlal_idq_trigger_gen: added hdf file saving along with trigger aggregation (max by specified cadence)

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