Add discussion section

Author: aclark4life

index.html

@@ -93,6 +93,9 @@ <h3><a href=
       reference</a>, <a href=
       "http://pillow.readthedocs.org/releasenotes/index.html">release
       notes</a> and more.</p>
+
+      <h3>Discussion</h3>
+      <p>Discussion occurs in <a href="">GitHub Issues</a>, on the <a href="https://mail.python.org/mailman/listinfo/image-sig">mailing list</a> and on <a href="irc://irc.freenode.net#pil">IRC</a>. IRC conversations are <a href="http://chat-logs.dcpython.org/channel/pil">logged here</a>.
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