Update Interfaces and add link.
Add fakes for using with Responder Test.
Add functions directory.
* Add Test PSR-4.
* Update PSR-4 Namespace. Might put this in its own package as well.
* Change main license to MIT. WordPress files will GPLv2 or later, because it is required.
Add namespace and add tests.
Update references to changed namespace.
Fix renamed namespace reference.