Let's host the site on github pages to automate deployment

[valkyriesavage]

Description There's no reason necessarily to host the site ourselves on the Savages' Linode box, since it is a static resource. We can just as easily set up automated deployment to github pages and save ourselves that particular headache.

Acceptance Criteria

• [x] github pages enabled on gh-pages branch
• [x] configure custom domain (juggercouncil.org) in settings, and ensure CNAME file is included in site
• [x] create .travis-ci.yml file that runs npm run build on new pushes to master, and updates gh-pages branch
• [x] juggercouncil.org DNS configuration on Linode updated to point to github pages

[candu]

Update: site transition to Github Pages is complete! 🎉