Enable downlaod button and updated the build

Author: kwsamarasinghe

peptides/app/js/peptide.js

@@ -349,6 +349,7 @@ function initNXDivs() {
                     brushActive: true,
                     toolbar: true,
                     bubbleHelp: true,
+                    buttonDownload: true,
                     tooltipColor:"black"
                 });
             }