Jade 1.0 and Browserify v3 Support

Adds support for Browserify v3 and Jade 1.0:

* Browserify v3 doesn't change too many external APIs so this transform "just works". This PR bumps the peer dep.

* Jade 1.0 introduced ```jade.compileClient``` to use rather than ```jade.compile({client: true})```. This uses ```jade.compileClient``` when available, to avoid a deprecation error in jade 1.0 and to continue to support backwards compatibility for jade < 1.0

Tests continue to pass for Browserify v2 and jade <= 0.35, as well as these new versions of those modules.

Thanks for the awesome module!