Update esformatter and add eslint
Update esformatter and add eslint

This adds support for ES6 syntaxes.

nexdrew/newww,nexdrew/newww,kemitchell/newww,watilde/newww,kemitchell/newww,nexdrew/newww,watilde/newww,kemitchell/newww,watilde/newww