Add DOIs to ShareYourPaper link when they're available

[JosephMcArthur]

SYP allows URLs such as https://shareyourpaper.org/10.1126/scitranslmed.3001922 to go direct to a deposit page. Where Fatcat has them it would be cool to add those to the current link shown.

[bnewbold]

This is now implemented, here is an example save page: https://fatcat.wiki/release/hsmo6p4smrganpb3fndaj2lon4/save