requirejs sync plugin loading support

requirejs.diff

diff --git a/require.js b/require.js
old mode 100644
new mode 100755
index 9147d58..4341bad
--- a/require.js
+++ b/require.js
@@ -254,7 +254,7 @@ var require, define;
             if (prefix) {
                 prefix = normalize(prefix, parentName);
                 //Allow simpler mappings for some plugins
-                prefix = requirePlugins[prefix] || prefix;
+                prefix = prefix || requirePlugins[prefix];
             }

             //Account for relative paths if there is a base name.
@@ -845,6 +845,17 @@ var require, define;
             }, config);
         }

+        function callPluginSync(moduleMap) {
+            var ret; // this will be the return value
+
+            plugins[moduleMap.prefix].load(moduleMap.name, makeRequire(moduleMap.parentMap, true),
+            function (value) {
+                ret = value;
+            });
+
+            return ret;
+        }
+
         function loadPaused(dep) {
             //Renormalize dependency if its name was waiting on a plugin
             //to load, which as since loaded.
@@ -1082,7 +1093,7 @@ var require, define;
                     //Normalize module name, if it contains . or ..
                     moduleMap = makeModuleMap(moduleName, relModuleMap);

-                    ret = defined[moduleMap.fullName];
+                    ret = defined[moduleMap.fullName] || callPluginSync(moduleMap);
                     if (ret === undefined) {
                         return req.onError(new Error("require: module name '" +
                                     moduleMap.fullName +