A trivial guestbook app

Functions for GET and POST endpoints. A redis.yaml to deploy redis on
kubernetes.  And a deploy.sh to deploy the fission functions with
routes.

examples/python/guestbook/add.py

@@ -0,0 +1,16 @@
+#
+# Handles POST /guestbook -- adds item to guestbook 
+#
+
+from flask import request, redirect
+import redis
+
+# Connect to redis.
+redisConnection = redis.StrictRedis(host='redis.guestbook', port=6379, db=0)
+
+def main():
+    # Read the item from POST params, add it to redis, and redirect
+    # back to the list
+    item = request.form['text']
+    redisConnection.rpush('guestbook', item)
+    return redirect('/guestbook', code=303)