Merge pull request #20 from navyxie/master

fix bugs : "ReferenceError: stream is not defined"

Author: tschellenbach

src/backends/mongoose.js

@@ -2,6 +2,7 @@ var baseActivitySchemaPlugin = require('./activity.js');
 var util = require("util");
 var baseBackend = require('./base');
 var mongoose = require('mongoose');
+var stream = require('../index.js')
 
 function Backend() {}