Merge pull request #211 from AtlasOfLivingAustralia/feature/issue207

Allow date to be blanked out by model change #207

Author: salomon-j

grails-app/assets/javascripts/knockout-dates.js

@@ -61,6 +61,9 @@
                 if (!isNaN(widget.date)) {
                     widget.setDate(widget.date);
                 }
+                else {
+                    widget.setDate(null);
+                }
             }
         }
     };