DIR-67 added department to search results and displayed it underneath person titles if present.
remove unneeded variable declaration
removed department attribute from SearchResult and changed view to use new `subtitles` normalized_data field.

This requires the latest buweb_content_models gem.
Merge pull request #15 from biola/person_department_search_result

DIR-67 added department to search results ...

since we all worked on this one, i'm just going to merge it