Fix homebrew link, formatting fixes

I added a closing anchor tag to the homebrew link to prevent it from taking over the rest of the page. There were a few formatting inconsistencies and I tried to fix those as well. The most major change was the change involving multi-line pre blocks from this:

    <div>
      <div>
        <pre>my code
    goes here
    and here</pre>
      </div>
    </div>

To this:

    <div>
      <div>
    <pre>
    my code
    goes here
    and here
    </pre>
      </div>
    </div>

I've included the outer div tags so the change can be seen more clearly. I think this change helps when actually writing the pre blocks so that the entire block of code can be seen as it would be seen in the console. Makes it particularly easy to see when there is stout as well, and helps ensure the distinction between the two can be easily seen.

    <pre>
    $ my_command
      stout: response
    $ other_command
      stout: other response
    </pre>

I've split this into a few commits so you can check each one individually. A few of the commits are pretty much just whitespace changes.

If you like my changes please merge, and if there's something wrong with what I've done, or you disagree with something and want me to change the way I've done it then let me know and I'll be happy to follow your rules.