Fixes AMD registration, volo package.json entry

This change allows the AMD define signature to match what common AMD optimizers use to find define calls that need naming.
Also updates the volo package.json entry so that the correct version of mustache can be fetched properly.

mustache.js

@@ -9,9 +9,9 @@
   if (typeof exports === "object" && exports) {
     factory(exports); // CommonJS
   } else if (typeof define === "function" && define.amd) {
-    define(factory({})); // AMD
+    define(['exports'], factory); // AMD
   } else {
-    global.Mustache = factory({}); // <script>
+    factory(global.Mustache = {}); // <script>
   }
 }(this, function (mustache) {
 
@@ -39,7 +39,7 @@
   function isWhitespace(string) {
     return !testRegExp(nonSpaceRe, string);
   }
-  
+
   var entityMap = {
     "&": "&amp;",
     "<": "&lt;",
@@ -575,6 +575,4 @@
   mustache.Context = Context;
   mustache.Writer = Writer;
 
-  return mustache;
-
 }));

package.json

@@ -13,7 +13,7 @@
     "mocha": "1.5.0"
   },
   "volo": {
-    "url": "https://raw.github.com/janl/mustache.js/0.7.3/mustache.js"
+    "url": "https://raw.github.com/janl/mustache.js/{version}/mustache.js"
   },
   "scripts": {
     "test": "mocha test"