gstlal_inspiral_add_dt_dphi_snr_ratio_pdfs : changed to pass snr dictioary and psd file name to the output .h5 file

dictioary and psd file name to the output .h5 file.

comparible with HLVK case in an ad-hoc way. ( load a new covmat.h5 and construct tree data from scratch.)

svd_bank_snr.py: split up the function svd_banks_from_event

	having --start / --end 650s larger/less than --gps-start-time / --gps-end-time is  probably an overkill. Reducing it to 50s.

gstlal_inspiral_plot_snr: drop format checking & fix output naming when --center and --span is given

inspiral_pipe.py: fix issue in accessing svd node properties in marginalize_layer() causing issues with DAG generation

adding m1 and m2, due to O3 bank not having mtotal column populated in imbh region

	-- add handle for relative path

	-- add method to make simplifed template table
	-- add examples

	-- add support for multiple instruments

	-- allow analysis for multiple instrument
	-- add save analysis file option

	-- add gracedb utils
	-- add options for re-calculating snr from gstlal events

now the dag goes till end without crashing. money plots seem sane, but the calculation done inside the LR code is still "terrible"

gstlal_inspiral_rerank_pipe, inspiral_pipe.py: fix some leftover issues/missing opts causing problems with DAG generation

inspiral_pipe.py: add load_analysis_output() utility for reranking dag, allow more flexibility in get_bank_params() and marginalize_layer()

multirate_datasource.py: remove application of vetoes pre-whitening, increate h(t) gate window from 0.25 to 0.5s

gstlal_inspiral_pipe: use OrderedDict for condor opts to preserve order, add in dynamic memory requests and ifo dependent memory requests for inspiral jobs