reorganize packages, start converting overall app to react (very broken at the moment)

Packages/ohif-viewerbase/client/components/viewer/studyTimepointBrowser/studyTimepointBrowser.js

@@ -1,7 +1,7 @@
 import { Template } from 'meteor/templating';
 import { ReactiveVar } from 'meteor/reactive-var';
 import { Tracker } from 'meteor/tracker';
-import { _ } from 'meteor/underscore';
+import _ from 'underscore';
 import { OHIF } from 'meteor/ohif:core';
 import { OHIFError } from '../../../lib/classes/OHIFError';