Added UrlGenerator and datasource interfaces
Added license blurbs
Added initial url generator implementation and datasource
Added url generator services in RouterExtensions
Added path twig function
Fixed failing test
Added test for RouterExtension->generateUrl
Implemented group count based data generator for simple url generator
Added new interfaces to phpunit
Moved request container registration to DefaultInitializer
Cleaned up handling of Request service in SimpleUrlGenerator
Merge branch 'feature/url-generator'