Link to RSS feeds

[camelid]

Fixes #420.

[camelid]

Replacement of #671.

[XAMPPRocky]

Thank you for your PR! Could you also include a screenshot of the change?

[camelid]

I don't love the placement; I think it might be better at the bottom of the page, but there wasn't anything existing there so I wasn't sure how I would set it up. Let me know if you have an idea on better placement!

[camelid]

And this is what the "Inside Rust" blog looks like:

[pietroalbini]

Random idea:

[camelid]

Hmm, that's interesting! Although there's already something in that column in the footer:

[XAMPPRocky]

I would add it as a another row inside the social column, since RSS is a social technology that people use to share our content, and I know I typically look for RSS with the rest of the social icons. I think it should maybbe look something along the lines like below.

[camelid]

That looks good!

[rbtcollins]

Perhaps use the RSS radar icon ?

[camelid]

@XAMPPRocky How did you get that layout? I tried this but it doesn't look quite right:

      <div class="four columns mt3 mt0-l">
        <div>
          <h4>Social</h4>
          <a href="https://twitter.com/rustlang" target="_blank" rel="noopener" alt="twitter link"><img src="/images/twitter.svg" alt="twitter logo" title="Twitter"/></a>
          <a href="https://www.youtube.com/channel/UCaYhcUwRBNscFNUKTjgPFiA" target="_blank" rel="noopener" alt="youtube link"><img style="padding-top: 6px; padding-bottom:6px" src="/images/youtube.svg" alt="youtube logo" title="YouTube"/></a>
          <a href="https://discord.gg/rust-lang" target="_blank" rel="noopener" alt="discord link"><img src="/images/discord.svg" alt="discord logo" title="Discord"/></a>
          <a href="https://github.com/rust-lang" target="_blank" rel="noopener" alt="github link"><img src="/images/github.svg" alt="github logo" title="GitHub"/></a>
        </div>
        <br>
        <div>
          <h4>RSS</h4>
          <a href="/feed.xml">Main Blog</a><br>
          <a href="/inside-rust/feed.xml">"Inside Rust" Blog</a>
        </div>
      </div>

[XAMPPRocky]

I just added a h4 with the mv3 class and an unordered list. Well more accurately I just copy pasted the ul from get help into the column.

[camelid]

Thanks, that fixed it! Pushed up the commit.

[camelid]

Do you want to merge this? It looks like this:

[XAMPPRocky]

Thank you for your PR!