Update README for Route53, Beanstalk, Shippable

[gfogle]

The README should be fleshed out to show how Route53 w/ A records, the Beanstalk app w/ ELB, and the Shippable configurations are configured

[gfogle]

http://docs.shippable.com/autodeploy-to-ebs/

[gfogle]

actually, i think this repo should be hosted in a different manner. currently its not easy for anyone to merge a PR and the site to get auto deployed etc. without distributing keys.

ive thought about moving it over to ST and using our process. or heroku. or travis. would also like a better way to use the twitter stuff without distributing keys. i guess i should create the app under react dc user account instead of my own.

open to ideas @reactdc/owners