issue #778 fixed

sails/src/api/controllers/StudentController.js

@@ -171,7 +171,7 @@ module.exports = {
         License.activate(params.license_number, created.id, function(err, license) {
           if (err)
             return res.serverError(err);
-          created = created.toObject();
+          created = created.toJSON();
           created.license = license.toObject();
           return res.ok(created);
         });

sails/src/api/models/Student.js

@@ -176,7 +176,6 @@ module.exports = {
       },
       legend: false,
       legend_size: 'normal',
-      pic: "defaultAvatar.jpg",
       size: 'large',
       picto_background: '#0000ff',
       tape_background: '#00ffff',
@@ -202,9 +201,6 @@ module.exports = {
           }
         });
       }
-      if (typeof validAttributes.pic !== 'string') {
-        delete validAttributes.pic;
-      }
       if (typeof validAttributes.input_selection !== 'object') {
         delete validAttributes.input_selection;
       } else {