Fix dead links

[logankilpatrick]

Resolves #156

See https://github.com/JuliaLang/www.julialang.org/commit/a795c88608690f9ea896408a6884e00145ae1ddf/checks?check_suite_id=373243536

for a list of all broken/dead links in the repo. These need to be updated with the appropriate links or have their content removed.

[ViralBShah]

In some cases (of internal links) the stuff has probably moved to a new URL. For external broken links, it is worth seeing if there are updated links.

[abhishalya]

Dead links: https://gist.github.com/abhishalya/fabbc769e939fa25ff61cbdd42e5bc9f

Also, seems like we need a better link checker :P

[ViralBShah]

Let's put these in a spreadsheet? I can provide updated links for most of these. Can probably just write a simple sed script to auto-replace the whole thing.

[logankilpatrick]

I made this a code in task and he’s going to update them in the morning, whether that be via a sed script or manually.

[logankilpatrick]

I’m not sure what a sed script is but it may be nice to have for future broken links.

[ViralBShah]

Here's a spreadsheet with all the broken links.

https://docs.google.com/spreadsheets/d/1g-2o6JcSw-f_sBsMBScVWycrw0JxZsnZ7J9-YldW8WE/edit#gid=1563594672

What we need to do is to populate the second column with the replacement. Then it is trivial to write a simple script to replace the broken links in one shot. The script should be checked into the repo as well.

sed: https://www.gnu.org/software/sed/manual/sed.html#Overview

[ViralBShah]

We should probably do similar check on julia docs as well.

[logankilpatrick]

Yep, will add a PR later today for this.