Added sample demonstrates a manually created, minimal bundle.

Sample is to be refactored in steps, each more fully utilizing symfony.
Refactored to template rendering via service lookup.
Substituted content rendering via templating service lookup for Controller convenience method renderView().
Refactored to Controller method render() in place of two step renderView()/Response().

This concludes the basic samples. The following refactorings were performed:
1. A content string was naively included in the controller and passed to Response().
2. The content string was factored out of the controller and into a separate template file. The templating service was located and used to render the template.
3. Rather than locating the templating service, renderView() was used to render the content at once.
4. renderView() was removed and replaced by render() to create the Response at once rather than rendering the content then creating the response from it.