PDF extraction doesn't insert double carriage returns after hyperlinks

[azamanian]

@reynoldsm88

In the pdf of document 205178682140df89b44d0eead8841451 we have some hyperlinks for sources:

such as "Libya Herald" and "Libya Now". It looks like we'd normally get nice, useful double carriage returns after the sources, but we're missing them here. Running the sources together with the dates on the next lines will confuse information extractors during name recognition.

pdf source:

http://www.insecurityinsight.org/aidindanger/wp-content/uploads/2017/10/The-Aid-in-Danger-Monthly-News-Brief-September-2017.pdf