Sets up continuous deployment for development

[helrond]

Sets up CD for development branch:

• Adds appspec.yml and associated deployment scripts
• Updates .travis.yml to trigger builds
• Refactors handling of configs to support setting of env variables in in Travis
• Slimming build as much as possible by removing unnecessary static files and build artifacts

[bonniegee]

This makes sense to me. I looked closely at the bash scripts, and don't have suggestions for them to be simplified.

[p-galligan]

Yeah, I think the documentation is generally pretty good. I would echo that I didn't come up with anything better for the bash scripts, but I've never been the best at those in general.