Move visitor into compiler subdir

lib/handlebars/compiler/printer.js

@@ -1,5 +1,5 @@
 var Handlebars = require("handlebars");
-require("handlebars/visitor");
+require("./visitor");
 
 // BEGIN(BROWSER)
 Handlebars.PrintVisitor = function() { this.padding = 0; };

lib/handlebars/compiler/visitor.js

@@ -0,0 +1,13 @@
+var Handlebars = require("handlebars");
+
+// BEGIN(BROWSER)
+
+Handlebars.Visitor = function() {};
+
+Handlebars.Visitor.prototype = {
+  accept: function(object) {
+    return this[object.type](object);
+  }
+};
+// END(BROWSER)
+