Merged LesionTracker and OHIF Viewer, refactored out common components

Packages/viewerbase/lib/getImageId.js

@@ -0,0 +1,10 @@
+getImageId = function(instance) {
+    if (!instance) {
+        return;
+    }
+    if (instance.wadouri) {
+        return 'dicomweb:' + instance.wadouri; // WADO-URI
+    } else {
+        return getWADORSImageId(instance); // WADO-RS Retrieve Frame
+    }
+};