Unescape the linker's url and browse-url data values as they are being double escaped.  (once by url_for and then again by the HTML escape). This will allow us to include more complex search queries (including filter_terms) for the typeahead and browse searches.
Merge pull request #125 from payten/support-filter-terms-in-linker-urls

Support filter_term parameters in the linker widget typeahead and browse URLs