Adding flexibility to --bind-fmaps

[sarahoh]

Currently, the --bind-fmaps flag populates the IntendedFor fields in the fmap/*.json files with the fieldmap(s) closest in time to the start of each BOLD series.

Because our fieldmaps are collected at the end of each BOLD run (and named accordingly), it would be nice to add some flexibility to the bind-fmaps feature. For example:

• an option to populate IntendedFor with the fieldmap closest in time to the end of the BOLD series
• and, if possible, an option to populate the IntendedFor fields with the fieldmaps indicated in Protocol_Translator.json

Thank you for your help!