Use title from abstract page when adding a PDF link from arXiv

[ELind77]

Current behavior

When I am looking at a PDF on arXiv (e.g. https://arxiv.org/pdf/1709.01058.pdf) and I click the Add to Pocket button in my browser, the title of the card/item in my Pocket library is an indecipherable id number--in this example it's 1709.01058.pdf.

Desired Behavior

When I save a PDF link from arXiv to Pocket, the name of the page in my library should be the title from the abstract page for the article. In the running example, the abstract page URL is: https://arxiv.org/abs/1709.01058 and the text of the H1 tag (and the text that Pocket uses if I save that page directly) is: "A Unified Query-based Generative Model for Question Generation and Question Answering."

Adding this functionality would make it much easier to use Pocket as a reading queue for academic research.

Notes:

• The translation between the two URLs is very straightforward though I'm not sure if they guarantee this pattern for all cases.