The Long Awaited 3.0 Release!

The good news:

 * CoffeeScript support. Minifyify can map all the way back to the source file now.
 * Much simpler code. Using the new global transforms in browserify 4 really cleaned things up.

The bad news:

 * Still no way to be a true transform unfortunately. The root problem is that minifyify does more than transform code -- it needs to maintain state all the way until the end of the bundling process in order to correctly transform the sourcemap.
 * I've dropped CLI support, now that minifyify is mostly a transform there isn't an elegant way to do this anymore.

This has been [published as 3.0.0-beta*](https://www.npmjs.org/package/minifyify) on npm, **please note the updated usage in the docs**. Give it a spin!

Thank you all for your issues (#36, #34, #33, #28) and feedback. I hope this major version resolves them.
@piranna @jenius @kesla @minddust @QuentinFchx