Added process_query_string and turned simple_query_string to a query_string. Also wrapped search.execute() calls in a try/except
Added process_query_string and turned simple_query_string to a query_string. Also wrapped search.execute() calls in a try/except

4dn-dcic/fourfront,4dn-dcic/fourfront,hms-dbmi/fourfront,hms-dbmi/fourfront,4dn-dcic/fourfront,hms-dbmi/fourfront,hms-dbmi/fourfront,hms-dbmi/fourfront,4dn-dcic/fourfront