3.0 - Not inflector in routes

This removes the use of the inflector in the Router. Default routes still exist and will keep doing inflections as usual. When connecting your own routes you will need to use the correct casing. Building urls with `Router::url()` will also require you to pass  the controller and plugin keys in the correct casing.

Fixes https://github.com/cakephp/cakephp/issues/2125
Some prefixes could have multiple words.