Adds support for querying single item sources (#39)
Adds support for querying single item sources (#39)

Previously you could only query lists.  This update to cql4browsers.js adds support for querying a single item.  Relates to BONNIE-307.
projecttacoma/cql_qdm_patientapi,projecttacoma/cql_qdm_patientapi,projecttacoma/cql_qdm_patientapi