Update the `TemplateCompile` step to use the full render `Compiler`.
Provide `DirectiveMetadata` for `ViewDefinition` objects and use it to
run the `DirectiveParser` step of the render compile pipeline.
BREAKING CHANGE:
Previously, `Directive` was the abstract base class of several directives.
Now, `Directive` is the former `Decorator`, and `Component` inherits from it.
Victor Berchet
Tim Blasi
Tobias Bosch