Refactor

[eoinmurray]

Thanks for the pull request - are you guys using the library for a real app?

Happy to accept the pull request if its working, I'm not working on this library anymore...

[jgimbel]

Yeah, we forked it to use babel and such. It's not quite ready to be used by other people. Some current things I want to change before we merge are,

• [ ] babel register is not optional, so even if you pre-babel it still requires the hook.
• [ ] The render to static string option is passed using res.local. I am not sure if we should do it in each route, or add an option to set the engine to render static markup always, or both.
• [ ] I'm worried a layout component is not optional, even though I meant it to be
• [ ] I would like options to be passed as an object instead of how they currently are, so the engine creator function is easier to modify.

• [ ] I would like an example document showing how to use this with another engine like pug.

  I meant to merge into my own master. After I complete these I will reopen the pull request.

EDIT: In other news, don't send markdown from email. Seems to not get built.