Add continuous integration automation scripts.

(imported from commit 61fc5fa1540732b0d1ad02faa95724cc6e2699c0)

tools/post-receive

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+#!/usr/bin/python
+#
+# Humbug's post-receive hook.  Deploy it by symlinking it to
+# /srv/git/humbug.git/hooks/post-receive
+#
+# The "post-receive" script is run after receive-pack has accepted a pack
+# and the repository has been updated.  It is passed arguments in through
+# stdin in the form
+#  <oldrev> <newrev> <refname>
+# For example:
+#  aa453216d1b3e49e7f6f98441fa56946ddcd6a20 68f7abf4e6f922807889f52bc043ecd31b79f814 refs/heads/master
+#
+# see contrib/hooks/ for a sample
+
+import os
+import sys
+import subprocess
+
+args = sys.stdin.read()
+oldrev, newrev, refname = args.split()
+
+if refname in ["refs/heads/master"]:
+    subprocess.check_call("env -u GIT_DIR /home/humbug/humbug/update-deployment".split())

tools/update-deployment

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+#!/bin/sh
+cd /home/humbug/humbug
+git fetch >/dev/null
+git reset --hard origin/master >/dev/null
+echo "Updated deployed version of humbug application!"