Import fixes necessary for client-only builds

Packages/ohif-core/package.js

@@ -20,6 +20,7 @@ Package.onUse(function(api) {
 
     // Component's library dependencies
     api.use('natestrauser:select2@4.0.1', 'client');
+    api.use('aldeed:simple-schema');
 
     // UI Styles
     api.addFiles([

Packages/viewerbase/lib/viewportFunctions.js

@@ -1,3 +1,5 @@
+import { OHIF } from 'meteor/ohif:core';
+
 getActiveViewportElement = function() {
     var viewportIndex = Session.get("activeViewport") || 0;
     return $('.imageViewerViewport').get(viewportIndex);