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/viewer/studyTimepointBrowser/studyTimepoint.styl

@@ -0,0 +1,8 @@
+@import "{design}/app"
+
+.studyTimepointWrapper
+  overflow: hidden
+  transition($sidebarTransition)
+
+.timepointEntry:not(.active) .studyTimepointWrapper
+  max-height: 0 !important