Arvados

Here are some suggestions for the 'anonymous download' page for shared collections.

For concreteness, here is a link with a single file 'testing.txt' which has the text 'testing' in it

https://workbench.qr1hi.arvadosapi.com/collections/download/qr1hi-4zz18-nqd6xzjpoj95nyc/4jjrkxvangx4ta6otcudr6ehkzf5swph2fdgbgd70fl4r4ll1g/

A screenshot is also attached.

Suggestions:

- Under 'To learn more, visit arvados.org...' should provide a link to arvados.org
  - The first thing at the top should be the file/collection that should be downloaded
  - Provide a 'download' button instead of/in addition to a link
  - Provide information on how to use the 'arv' tools to download the collection or information creating an arv mount point.  For example, the ARVADOS_API_TOKEN and ARVADOS_API_HOST are embedded in the URL but this is not obvious.  Providing that information on the page may be too busy so maybe as a compromise a link/modal/collapsible pane could be provided that gives the information on how to use the arv tools for this collection.

The download page itself works as advertised but it might be worthwhile to provide more context for someone who might have stumbled onto the page without knowing exactly what they were looking for.