Added ChildAction Renderer sample page.
Moved route registration from referenced assembly to package content.
Merge branch 'dev/childaction-renderer' of https://github.com/Sitecore-Community/Sitecore-Mvc-Contrib into dev/childaction-renderer

* 'dev/childaction-renderer' of https://github.com/Sitecore-Community/Sitecore-Mvc-Contrib:
  Added ChildAction Renderer sample page.

Conflicts:
	src/Sitecore.Mvc.Contrib.Sample/content/Controllers/IsChildActionController.cs
	src/Sitecore.Mvc.Contrib.Sample/content/Views/IsChildAction/Index.cshtml