Changed Twitter OAuth endpoints to use the new api.twitter.com

src/main/java/org/scribe/builder/api/TwitterApi.java

@@ -5,12 +5,12 @@ public class TwitterApi extends DefaultApi10a
   @Override
   protected String getAccessTokenEndpoint()
   {
-    return "http://twitter.com/oauth/access_token";
+    return "http://api.twitter.com/oauth/access_token";
   }
 
   @Override
   protected String getRequestTokenEndpoint()
   {
-    return "http://twitter.com/oauth/request_token";
+    return "http://api.twitter.com/oauth/request_token";
   }
 }