Support es6 files as javascript

[joefiorini]

The ember-appkit-rails library uses the .es6 extension to support ES6 modules. Adds support for this type.

[nathansobo]

💥 Esoteric one.

[joefiorini]

Happy to close it if there's a way I can map all .es6 files to JavaScript in Atom. I couldn't find it in the docs or elsewhere.

[HeroicEric]

@joefiorini Agree that I'd like to know if there is a way to easily just tell language-javascript to also support .es6 but I set this up for now. https://atom.io/packages/language-es6

[kevinsawicki]

Thanks for this, cherry picked it to master since there was a merge conflict as 988eff4

[nathansobo]

@joefiorini. No this is fine. I was down to merge when I commented, then hit the merge conflict and got pulled away. Looks like Kevin got it in.