Datacage: Added dc:min-number(list) and dc:max-number(list) to extract the numerical minimum/maximum from a list of numbers. Example: dc:min-number(dc:find-all('\d{4}', '1919 1291 1299 3029')) returns 1291

<?xml version="1.0" encoding="UTF-8" ?>
<rest-server>
    <!--  The port which the ArtifactDatabase (ArtifactServer) will bind to. -->
    <port>8181</port>
    <listen>localhost</listen>
</rest-server>