New v5 refactor

[g105b]

v5 introduces some new techniques for making the request/response simpler, and this PR brings everything together in a refactor to improve readability and reduce overall complexity of classes, etc.

[g105b]

I'm finishing this up today. High value tasks:

• Dispatcher needs more focussed tests for the request's lifecycle branches. The tests should veridy redirect short -circuiting, 404 generation when no view/logic files exist, defaulting the response to 200, mapping thrown ResponseStatusException objects to error statuses, generating a basic error page in production vs non-production.
• LogicExecutor needs to test both execution modes. The unit tests should prove that class-based logic files call instance methods, classless logic files are loaded through the logic stream wrapper. go_before/go/go_after ordering needs testing.
• HTMLDocumentProcessor should test that dynamic paths add the expected body classes, component files produce LogicAssemblyComponent entries, missing component PHP files are skipped cleanly, and missing partial/component directories do not throw exceptions.
• DefaultServiceLoader needs tests to support that each loader returns the correct type and pulls dependencies from the container correctly. The important ones are things like response headers, request URI, binder/document wiring, list element collection, and database settings including fallback defaults.

Once these tests are written, ContainerFactory needs tests for custom service loader registration, LogicStreamHandler needs tests for registering the wrapper only when the protocol is absent, LogicProjectNamespace should test path-to-namespace conversaion, and ViewStreamer should prove the correct view object recieves the correct model.

[g105b]

After checking the phpunit coverage output, the priority is as follows:

1. Dispatcher - plenty of methods requiring obvious tests and edge case catches
2. DefaultServiceLoader - each loader method needs testing. Easy peasy.
3. ContainerFactory - both paths need testing (custom service loader with fallback to default).
4. Application - some missing pieces in this important class, like shutdown/finish doing the same thing each time, error paths that rebuild the dispatcher with error status, fallback to basic error pages, optional request logging paths.
5. AppAutoloader and LogicStreamHandler - fill the remaining branch gaps rather than rewriting them broadly.