Rafter - API and Serverless

You can now use Rafter for both web api's, which runs on expressjs, or serverless apps, which still contains all the great stuff Rafter provides (eg. DI, config merging etc), without the server.

There's also improvements to config merging and a new, simpler, way to define plugins.

Plugin Support

This is the first release where Rafter has the ability of consuming plugins. This opens up a big possibility of reuse and also getting up and running quickly without having to write wrappers etc for things like databases, logging etc.