Pass suite reference to batches

Author: Yurii Rashkovskii

lib/vows/suite.js

@@ -107,6 +107,8 @@ this.Suite.prototype = new(function () {
             tests   = batch.tests,
             promise = batch.promise = new(events.EventEmitter);
 
+        var that = this;
+
         batch.status = 'begin';
 
         // The test runner, it calls itself recursively, passing the
@@ -169,6 +171,7 @@ this.Suite.prototype = new(function () {
                 // Create a new evaluation context,
                 // inheriting from the parent one.
                 var env = Object.create(ctx.env);
+                env.suite = that;
 
                 // Holds the current test or context
                 var vow = Object.create({