Convert to ES6 that is supported on Node 4, commonjs modules and remove Babel

[corbinu]

This removes Babel, converts to commonjs modules and removes other ES6 features not supported on Node 4. I think it was all destructuring.

Updated version of #8 which removes .defaults and rebased on master

[not-an-aardvark]

I think you might have accidentally gotten rid of some of the previous commits to master on this branch.

[corbinu]

I was trying to remove some master commits that were on my master but not this one. Not what happened with the errors though will fix

[corbinu]

@not-an-aardvark Looks like travis just needed to be updated to match :)

[not-an-aardvark]

No, I mean that this PR makes a bunch of changes to unrelated files such as README.md, effectively reverting commits like cf38df0.

[soda0289]

I think you need to rebase off of master.

[not-an-aardvark]

Is it possible that when you removed the commits that were on your master, you were accidentally comparing to the estools/escope repo instead of eslint/eslint-scope?

[corbinu]

@not-an-aardvark Ahh I know what I did wrong sorry