(feat) add single export/save as actions

UI/WebServerResources/js/Contacts/CardController.js

@@ -32,6 +32,7 @@
     vm.reset = reset;
     vm.cancel = cancel;
     vm.confirmDelete = confirmDelete;
+    vm.exportCard = exportCard;
     vm.viewRawSource = viewRawSource;
 
     function addOrgUnit() {
@@ -123,6 +124,10 @@
         });
     }
 
+    function exportCard() {
+      window.location.href = ApplicationBaseURL + '/' + vm.currentFolder.id + '/export?uid=' + vm.card.id;
+    }
+
     function viewRawSource($event) {
       Card.$$resource.post(vm.currentFolder.id + '/' + vm.card.id, "raw").then(function(data) {
         $mdDialog.show({