add layout for the posts

templates/layout.html.slim

@@ -0,0 +1,19 @@
+doctype 5
+html
+  head
+    title zero-knowledge
+    link(
+      href='/atom.xml'
+      rel='alternate'
+      title='Atom 1.0'
+      type='application/atom+xml')
+    link(
+      href='/stylesheet.css'
+      rel='stylesheet'
+      type='text/css')
+  body
+    header
+      h1 zero-knowledge
+      h2 noch ohne blub
+    #content
+      ==yield

templates/posts/index.html.slim

@@ -1,19 +1,10 @@
-doctype 5
-html
-  head
-    title zero-knowledge
-  body
+- for post in fetch(:posts)
+  article
     header
-      h1 zero-knowledge
-      h2 noch ohne blub
-    #content
-      - for post in fetch(:posts)
-        article
-          header
-            h1
-              a href="/post/#{post[:post_id]}"= post[:title]
-          footer
-            .author=post[:username]
-            .date=  post[:written].strftime('%Y-%m-%d')
-            .time=  post[:written].strftime('%H-%M')
-          section==Kramdown::Document.new(post[:content]).to_html
+      h1
+        a href="/post/#{post[:post_id]}"= post[:title]
+    footer
+      .author=post[:username]
+      .date=  post[:written].strftime('%Y-%m-%d')
+      .time=  post[:written].strftime('%H-%M')
+    section==Kramdown::Document.new(post[:content]).to_html