rn: headers on every page

Some pages were missing their headers.

Author: tfnico

rev_news/archive.md

@@ -3,6 +3,8 @@ layout: default
 title: Git Rev News Archive
 ---
 
+# Archive
+
 Here you can see all the previous editions. See [About Git Rev News](/rev_news/rev_news.html) for ways you can subscribe.
 
 <ul>

rev_news/index.md

@@ -4,6 +4,7 @@ title: Git Rev News
 ---
 
 # Latest edition
+
 {% for post in site.posts limit:1 %}
   {% include news_item.html %}
 {% endfor %}

rev_news/news_sources.md

@@ -3,6 +3,8 @@ layout: default
 title: Git Rev News Sources
 ---
 
+# Sources
+
 Some ideas on where we can go to gather Git Rev News material.
 
 ## Mailing lists