Make sure URLs in references are linked properly

[purva-thakre]

After changes introduced in #228, make sure all links in articles.bib show up correctly as links. Currently, some of the URLs are strings because pybtex was unable to parse "\url{some_link}" correctly.

The goal of this issue is to figure out what format works for URLs in sphinxcontrib-bibtex and is also compatible with pybtex. Then, apply those changes to most of the @misc refs in articles.bib.

[vprusso]

Is this still an issue? If so, are there specific links that are rendering in this way as an example? ( @purva-thakre )

[purva-thakre]

@vprusso Yes, this is still relevant. I don't think this is high priority though.

Some links on the references page of the docs are not clickable. For example, all the Wikipedia links:

[vprusso]

Ah, okay. I think I know why. It looks like the url entry in the refs.bib file is empty. I'll go ahead and make a fix for this. Thanks for the clarification!

[purva-thakre]

The url entry is empty because it would lead to build errors.

See #228 (comment)

[vprusso]

So far so good:
#827

I'll keep adding the references and hope that nothing breaks :P