Fix issue where Bio::Graphics::Browser2::RegionSearch::search_features
"uniqueifies" results where the type and start & end locations are the same,
despite a comment stating that name & type should be uniqueifying criteria,
by adding display_name to the mix.
Merge pull request #45 from nathanweeks/issue/regionsearch-features-same-location

Search results return only one feature with the same type, start, and end