Build search and information pages

Adds search and information page for organisations

Story: https://www.pivotaltracker.com/story/show/73388408

I'm not sure this method, the "specialist_sectors" method, or the "groupings" method are worth separating.  Since they're all private and do nothing other than call each other, I'd find it easier to follow the code if they were all inlined; ie, just do in `parsed_content`:

    content["facets"]["specialist_sectors"]["options"].map

This is much less code to read.  (I believe `content` is already a hash, so calling content.to_hash isn't needed,)