Add exports

Author: manuels

interface.js

@@ -1,4 +1,4 @@
-(function(){
+(function(exports){
   var Promise = function() {
     var callbacks = [];
     var result = null;
@@ -21,7 +21,7 @@
   };
 
 
-  var Interface = function(worker_script) {
+  exports.Interface = function(worker_script) {
     this.worker = new Worker(worker_script);
     this.promises = [];
     var self = this;
@@ -140,4 +140,4 @@
       return prom;
     }
   }
-})();
+})(window);