noindex support for small results

- Added noindex_pages_with_fewer_than_n_results param
- If results is less than the noindex_pages_with_fewer_than_n_results param we insert noindex meta
	- `<meta name="robots" content="noindex, follow" />`

https://github.com/GigaOM/gigaom/issues/5221
well I somehow missed the wp_head_noindex bit and didn't realize there was an existing function for that.

The template_redirect thing seemed kind of a roundabout way of going about it.  And there was already a wp_footer method in scriblio. But It makes a bit more sense to me now.