Create Pattern Lab Demos page

[bradfrost]

We currently only have one demo: http://demo.patternlab.io/ But we have a whole slew of repositories, instances, configurations, styleguidekits, etc. The previously-mentioned link would become an table of contents page linking off to demos showcasing each permutation of Pattern Lab.

For instance, demo.patternlab.io/starterkit-mustache-materialdesign would showcase the guts of this repo.

[JoeSpencer]

demo site is currently down

[bradfrost]

@JoeSpencer Thanks for the heads up. I updated some DNS records in order to get HTTPS working on the website (which is hosted on Github Pages). Just made some further changes to the DNS records so hopefully that fixes things.