add related_items search
re-add view links for tagged and related_to searches
add search#created_by
Merge branch 'kete2' into rr-related-item-searching

Conflicts:
	app/views/topics/_related_items_for_content_items.html.haml
	app/views/topics/related_items_for_topics/_generic_items.html.haml
	app/views/topics/related_items_for_topics/_still_images.html.haml
fix errors in related_items box
add tests for related_items
Rename SearchResult to SearchResultPresenter to be clearer about its role
Merge pull request #14 from kete/rr-related-item-searching

Rr related item searching