Dead links to tutorial files

[serosko]

Dead links to tutorial files

[standage]

Links to mock data in the quick start and the tutorial have been updated to osf.io links (details in #327). Please check https://kevlar.readthedocs.io and confirm these links work for you.

[serosko]

The links are fine now.
Small bug left:
There is a missing pipe in the download command for the helium-config:
curl -L https://osf.io/86adm/download sed "s:/home/user/Desktop:$(pwd):g" > helium-config.json
should be
curl -L https://osf.io/86adm/download | sed "s:/home/user/Desktop:$(pwd):g" > helium-config.json

[standage]

Good catch. Fixed in ebabd62.