First set of changes for direct download. Needs further testing.

* Fixed bug introduced in download change and updated ndn-js (Backport)

Change-Id: I72742322cca6aa7d6e7f4c2b5f90e7035d6e6953
diff --git a/client/catalog-dev/css/style.css b/client/catalog-dev/css/style.css
index ee3e460..d30dfc9 100644
--- a/client/catalog-dev/css/style.css
+++ b/client/catalog-dev/css/style.css
@@ -203,7 +203,7 @@
 
 #requestForm {
   max-width: 500px;
-  min-height: 300px;
+  /* min-height: 300px; */
   position: relative;
 }
 
@@ -260,3 +260,11 @@
   margin: 0;
   padding: 0;
 }
+
+#direct-download-list:before {
+  content: "The following are available for direct download:";
+}
+
+#direct-download-list:empty:before {
+  content: "No names in the selection are available for direct download...";
+}