*.gyp support

[stevenvachon]

Using gyp.js or gyp, we could provide backward-compatibility with current Node.js projects. This would provide time to deprecate gyp until removing support.

[refack]

I'm willing to tackle this one.

[eljefedelrodeodeljefe]

I like the idea. Slightly related is #16

[eljefedelrodeodeljefe]

Gyp handles finding binaries and headers. This is what the rather verbose part of this repo does too, but last years developments by MS can tackle this better. Just FYI.