Update ES6 feature page to include io.js 2.x's features

[ide]

Addresses the major additions from V8 4.2 for #332 and nodejs/node#1610.

[fhemberger]

Pinging @nodejs/core, are the ES6 changes okay? Can we merge this?

[Fishrock123]

LGTM

[Fishrock123]

(There may be other details that can be added though.)

[fhemberger]

I'd like to merge this change and notify the translators. (If there are any further details worth adding, we can do this in another PR) Any objections?

[bnb]

Not from me.

[fhemberger]

Pinging @nodejs/iojs-ar @nodejs/iojs-bg @nodejs/iojs-bn @nodejs/iojs-cn @nodejs/iojs-cs @nodejs/iojs-da @nodejs/iojs-de @nodejs/iojs-el @nodejs/iojs-es @nodejs/iojs-fa @nodejs/iojs-fi @nodejs/iojs-fr @nodejs/iojs-he @nodejs/iojs-hi @nodejs/iojs-hu @nodejs/iojs-id @nodejs/iojs-it @nodejs/iojs-ja @nodejs/iojs-ka @nodejs/iojs-ko @nodejs/iojs-mk @nodejs/iojs-ms @nodejs/iojs-nl @nodejs/iojs-no @nodejs/iojs-pl @nodejs/iojs-pt @nodejs/iojs-ro @nodejs/iojs-ru @nodejs/iojs-sv @nodejs/iojs-sw @nodejs/iojs-ta @nodejs/iojs-tr @nodejs/iojs-tw @nodejs/iojs-uk @nodejs/iojs-vi for content update, see commit 6decf8d.

(Phew, we have to come up with something better than this)

[IonicaBizau]

Phew, we have to come up with something better than this

@fhemberger Maybe creating a new team named i18n (or so) having all the members from these teams?

[fhemberger]

Yes, but I don't have the rights to set this up. ;)

[IonicaBizau]

@fhemberger We can invoke @mikeal powers! ⚡ 💥