EMS 0.4

This release marks a big step towards a full working application.

Routing is now, besides route caching, completed.
The interfaces for Input, Message, Stream, Url habe been aligned with PSR-7.
This release has a lot of incompatible changes that will break your application if you used the Http Stuff, or classes from core.

Full Changelog: v0.3.3.1...v0.4.0