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

PETSUVMeasurements/server/dropAllCollections.js

@@ -0,0 +1,12 @@
+// Temporary fix to drop all Collections on server restart
+// http://stackoverflow.com/questions/23891631/meteor-how-can-i-drop-all-mongo-collections-and-clear-all-data-on-startup
+Meteor.startup(function() {
+    console.warn('Dropping all Collections!');
+    for (var property in global) {
+        var object = global[property];
+        if (object instanceof Meteor.Collection) {
+        	console.warn('Dropping: ' + object._debugName);
+            object.remove({});
+        }
+    }
+});