Search appearance

This builds on the work @blisteringherb did on getting an image add to each search result and updating the appearance for the main search page. I made some style tweaks based on the mocks and refactored it a little to use the new neue theme functions @aaronschachter and I worked on. 

cc: @DFurnes @weerd @barryclark 
Could split this out a smaller function like `get_search_vars` in case we want to use anywhere else.. or call within the `get_search_gallery` type function ...