Re #6516 Make sure output is saved in the right place
Re #6516 Make sure we can find the data files
Re #6516 Make sure output data is saved properly
Re #6516 Get rid of API v1 code
Re #6516 minor tweaks
Re #6516 Turn APIv2 on by default
Re #6516 Fix multiple background files issue
Merge remote-tracking branch 'origin/feature/6516_sans_reduction_apiv2'