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-study-list/server/lib/encodeQueryData.js

@@ -0,0 +1,18 @@
+/**
+ * Converts the properties to URL query parameters.  Based on:
+ * http://stackoverflow.com/questions/111529/create-query-parameters-in-javascript
+ *
+ * @param data
+ * @returns {string}
+ */
+encodeQueryData = function(data) {
+    var ret = [];
+
+    for (var d in data) {
+        if (data[d]) {
+            ret.push(encodeURIComponent(d) + '=' + encodeURIComponent(data[d]));
+        }
+    }
+
+    return ret.join('&');
+};