Work on refactoring measurements out of Lesion Tracker package

- Removed AssociatedStudies Collection
- Measurement API is generated from configuration files
- Data exchange methods are defined in configuration

OHIFViewer/client/routes.js

@@ -1,16 +1,5 @@
 Session.setDefault('ViewerData', {});
 
-// Re-add any tab data saved in the Session
-WorklistTabs.remove({});
-Object.keys(ViewerData).forEach(function(contentId) {
-    var tabData = ViewerData[contentId];
-    var data = {
-        title: tabData.title,
-        contentid: tabData.contentid
-    };
-    WorklistTabs.insert(data);
-});
-
 Router.configure({
     layoutTemplate: 'layout',
     loadingTemplate: 'layout'
@@ -30,16 +19,6 @@ Router.route('/viewer/:_id', {
     name: 'viewer',
     onBeforeAction: function() {
         var studyInstanceUid = this.params._id;
-        
-        // Check if this study is already loaded in a tab
-        // If it is, stop here so we don't keep adding tabs on hot-code reloads
-        var tabs = WorklistTabs.find({
-            studyInstanceUid: studyInstanceUid
-        });
-
-        if (tabs.count()) {
-            return;
-        }
 
         this.render('ohifViewer', {
             data: function() {