In OAuth requests, get req.path

Using req.route.path breaks OAuth whtn used with regex routes. Instead
of this we need to use req.path because the path is already expanded

app/models/oauth.js

@@ -108,7 +108,7 @@ var oAuth = function(){
           return;
         }
         
-        var path   = httpProto + '://' + host + req.route.path;
+        var path   = httpProto + '://' + host + req.path;
         that.splitParams(req.query);
 
         // remove signature from passed_tokens