Datastream file sizes on landing pages

[spikelynch]

Datastream links on the Damyata landing pages don't have file sizes.

According to a quick read of the Fedora docs, we can only pull sizes out of the repository for managed content, not content referred to by URL (which is what we're using).

So this needs some kind of workaround. Ideas:

• Have CoataGlue add the filesize to the datastream label when it processes the dataset
• Have Damyata get the filesize when it renders the page, either by directly looking at the file's location or through a call to nginx

The second is the least clunky.

I'm not doing this now because it's not an ANDS deliverable.

[spikelynch]

Changed my mind and did a hacky solution for this, because the data landing pages looked incomplete without it.