Upload NIDM Results to NeuroVault

[tsalo]

The tool for exporting FSL FEAT directories to NIDM Results packs, nidmfsl, is having problems with one of our one-sample group-level analyses, so @jessicabartley is uploading niftis to NeuroVault directly, but ultimately it would be best to replace these with NIDM Results. This isn't a high priority, but would be good to do at a later date.

Reasons why:

• Information currently stored in the design.fsf files is stored automatically
• Results link contrast, statistic, and error maps together explicitly, rather than saving them as separate entities on NeuroVault
• The above two reasons will remove the need to host any images on GitHub