Support lt and gt integer comparisons

Change-Id: If17b7da35f43ecb9c3c69cb91f404cdc21db5392
diff --git a/dev/js/src/vc/doc.js b/dev/js/src/vc/doc.js
index d504642..8202fb5 100644
--- a/dev/js/src/vc/doc.js
+++ b/dev/js/src/vc/doc.js
@@ -715,7 +715,13 @@
       case "leq":
         string += (this.type() == 'date') ? 'until' : '<=';
         break;
-      default:
+      case "lt":
+        string += '<';
+        break;
+      case "gt":
+        string += '>';
+        break;
+       default:
         string += (this.type() == 'date') ? 'in' : '=';
         break;
       };