Add feed of hack write ups

Author: benfoxall

pages/feed.xml

@@ -0,0 +1,25 @@
+---
+layout: null
+permalink: /feed.xml
+---
+<?xml version="1.0" encoding="UTF-8"?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+    <channel>
+        <title>{{ site.title }}</title>
+        <description>{{ site.description }}</description>
+        <link>{{site.url
+        }}</link>
+        <atom:link href="{{ site.url }}/feed.xml" rel="self"
+            type="application/rss+xml" />
+        <lastBuildDate>{{ site.time | date_to_rfc822 }}</lastBuildDate>
+        <pubDate>{{site.time
+        | date_to_rfc822 }}</pubDate>
+        <ttl>60</ttl> {% assign sorted_hacks = site.hacks |
+        where:"upcoming",false | sort:"date" | reverse %} {% for hack in sorted_hacks %} <item>
+            <title>{{ hack.title }}</title>
+            <description>{{ hack.content | xml_escape }}</description>
+            <link>{{ site.url }}{{ hack.url }}</link>
+            <guid isPermaLink="true">{{ site.url }}{{ hack.url }}</guid>
+            <pubDate>{{ hack.date | date_to_rfc822 }}</pubDate>
+        </item> {% endfor %} </channel>
+</rss>