New product comparison table added

This has been added, currently on /basic and /pro pages, as shown below.

Do we really want the links to also point to /basic and /pro, or somewhere else?

SVG's are accessible too!

![screen shot 2014-11-11 at 17 36 41](https://cloud.githubusercontent.com/assets/2903904/4997731/590c5cfc-69c9-11e4-9749-5b17d01d0d23.png)

@samjewell Can you place this in a div please? Makes it lots easier to set up Optimizely (and improves page load times with Optimizely too).