WIP: Multiple fixes

I'll put these in a CHANGES file shortly:

* ENH: Allow ants use a single mask image
* ENH: Create configuration option for parameterizing directories with hashes
* ENH: arrange nodes by topological sort with disconnected subgraphs
* ENH: uses the nidm iri namespace for uuids
* ENH: remove old reporting webpage (this is a WIP i hope to finish in a day or two)

* FIX: example openfmri script now makes the contrast spec a hashed input
* FIX: FILMGLS compatibility with FSL 5.0.5
* FIX: Freesurfer recon-all resume now avoids setting inputs

i don't have the bandwidth to test these exhaustively. it would be good to have these in master to get feedback if anything broke.