Add archive for tweets contenttype

[mbootsman]

Hi,
I added a contenttype tweets in content and added some md files in the tweets directory.
after that I added a tweets.md file in the content directory. with this content:

---
title : "Tweets archive" 
layout : "list" 
url : "/tweets" 
type : "tweets"
---

In the layouts directory I added a tweets directory and in that folder a list.html file with the content of archive/list.html from the theme

When going to `localhost:1313/tweets` I now see the standard `archive/list.html` layout from the theme but with the posts, instead of the tweets. How do I make sure the `tweets/llist.html` only uses the `tweets` content type?