fix populate all returning nested

Author: FloGou

package.json

@@ -1,7 +1,7 @@
 {
   "author": "flogou <florent.gouget@gmail.com>",
   "name": "angular-orm",
-  "version": "2.0.3",
+  "version": "2.0.4",
   "description": "",
   "homepage": "",
   "dependencies": {

src/ActiveRecord.js

@@ -377,8 +377,8 @@ export default function ActiveRecord (model, name, SManager = SessionManager(mod
       // Get from the model the fields that reference another object
       var pop = _.pick(model, function (v) {
         if (_.isArray(v))
-          return v[ 0 ].ref;
-        return v.ref;
+          return v[ 0 ].ref && !v[ 0 ].nested;
+        return v.ref && !v.nested;
       });
 
       if (populateArray === 'all') {