Standardize/improve task naming and data downloading.

[rwblair]

The task directory names can be noticeably different from the “official” name that e.g. shows up in a search - when collaborating with others I may have to view their code / config file to make sure I’m grabbing the correct task. It might be nice to standardize these directory names (e.g. task-taskname_group-groupname.js) and have a check for formatting a la BIDS. Somewhat niche, but this did happen while setting up Matilde’s battery, and standardized naming could just help organization in general.

At the same time, expfactory does not like if you have numbers, or capital letters and quietly prevents you from uploading tasks. Either allow these things OR have clear warnings about those, so ross doesn’t have to go into the guts and figure out why tasks aren’t uploading correctly

Maybe add a validator for checking naming and config info?