The Long Awaited 3.0 Release!

The good news:

 * Browserify 4 support. I've removed the peerDependency, it was more trouble than it was worth.
 * 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.
 * No more ugly API. 3.0 uses the browserify plugin interface!

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