Update CoffeeScript to ~1.7.0

[Nicolas Stepien]

http://coffeescript.org/#changelog

[Tyler Kellen]

PRs welcome.

[Pierre-Antoine Delnatte]

Hi, have you any clue for an ETA of this PR on npm ?
Thanks in advance :)

[Vlad Filippov]

@leny I will try to publish it in the evening, unless someone else on the team publishes it.
Thanks

[Kyle Robinson Young]

Published as 0.9.0.

[Pierre-Antoine Delnatte]

Thanks @shama 😄