DEV: overhaul posterior sample loading
This MR changes how input samples are specified. Now the filess are specified with a json (dictionary) format and all results are expected to be a pesummary metafile.
(cherry picked from commit 7f9fb61c)
This MR changes how input samples are specified. Now the filess are specified with a json (dictionary) format and all results are expected to be a pesummary metafile.
(cherry picked from commit 7f9fb61c)