Linting and automated code style enforcement

[tomwayson]

Need to make sure all code conforms to whatever we use for automated linting and code style enforcement. Currently there is a .jshint file, but the actual code does not conform to it (indents, etc). I'd also like to either add JSCS or replace jshint w/ ESLint. I'm leaning towards the latter. Will need to update .editorconfig to conform w/ the above.

A note on indents, I prefer 2 spaces, but in the interest of not updating every line of source code in this repo, I think it's better to set the default to 4.