Suggestion: Use same license as eventmachine gem

[clemens]

It might just be my opinion, but if it's possible, I think this "child" gem should have the same license as its parent (which, to the best of my understanding, is dual licensed with GPL and the Ruby license).

Since this requires consent from all authors, I'll tag all authors here in the hopes of determining that 1) it's a change worth making and 2) all required people can add their consent.

@tmm1 @raggi @nahi @jf647 @cmdrkeene @skaes @alor @igrigorik @abonec @meh @gdb