Handle psd.xml.gz files
PESummary needs to be able to handle psd.xml.gz files as input. This has been started here (https://git.ligo.org/lscsoft/pesummary/blob/master/pesummary/gw/inputs.py#L215) but needs to be finished.
PESummary needs to be able to handle psd.xml.gz files as input. This has been started here (https://git.ligo.org/lscsoft/pesummary/blob/master/pesummary/gw/inputs.py#L215) but needs to be finished.