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-user-management/client/components/timeoutCountdownDialog/timeoutCountdownDialog.styl

@@ -0,0 +1,15 @@
+#timeoutCountdownDialog
+  display: none
+  position: absolute
+  top: 0
+  bottom: 0
+  left: 0
+  right: 0
+  margin: auto
+  width: 20%
+  height: 15%
+  z-index: 100
+  border-radius: 5px
+  padding: 10px 20px 10px 20px
+  background-color: rgba(255,255,255,1)
+  outline: none