linking accounts now works.

bug, need to change how loopback generates provider string.

server/utils/rx.js

@@ -22,7 +22,7 @@ exports.saveInstance = function saveInstance(instance) {
 // alias saveInstance
 exports.saveUser = exports.saveInstance;
 
-exports.observableQueryFromModel =
+exports.observeQuery = exports.observableQueryFromModel =
   function observableQueryFromModel(Model, method, query) {
     return Rx.Observable.fromNodeCallback(Model[method], Model)(query);
   };