Create some more top-level pages for comparisons

[agjohnson]

We have a number of comparison pages and we are starting to accumulate more tool pages. We're probably to the point we need some index or a singular index page to list these subpages. Our main goal is making the pages findable and getting them indexed, the secondary goal here is cleaning up the footer.

I also mentioned this in #176, where the "Features" dropdown would probably become a menu of sorts with these extra links.

[ericholscher]

The real goal here is to remove these pages from the footer -- we can also look at linking them in other places.