This introduces a new middleware method, staticViews, that works as
a catch-all to render views that don't need template data. That way
they can extend layouts and stay up to date much more easily.
staticViews improvements:
  from feedback, changed name to staticTemplateViews;
  rethrows non "template not found" errors;
  some refactoring to clarify logic;
  limiting the urls it operates on
Add view search path prefixing to limit statically renderable templates.
Merge pull request #842 from stenington/static-template-views

staticTemplateViews middleware