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

Packages/ohif-viewerbase/client/components/basic/aboutModal/aboutModal.js

@@ -0,0 +1,5 @@
+Template.aboutModal.helpers({
+    githubUrl() {
+        return 'https://github.com/OHIF/Viewers';
+    }
+});