Prerequisites:
 - Java 1.6
 - Ant
 - Maven
 - J/GAE (tested against 1.2.6)
 - Scala 2.7.x (or possibly later)

To build:

1. Edit build.xml and make sdk.dir point to your J/GAE install; or create
   an etc/user.properties file to customize this value (preferred option).
2. Run mvn package
3. Run ant

This will give you a local instance running  http://localhost:9000/ which you can test
with: curl http://127.0.0.1:9000/date -X POST -d text=Sydney

To deploy:

$GAE_HOME/bin/appcfg.sh --email=account@yourdomain.com update target/example-webhook

To try it:

$ curl http://taykt-demo.appspot.com/date -X POST -d text=Sydney
It's 2009-09-17 06:21 in Eastern Standard Time (New South Wales)

$ curl http://taykt-demo.appspot.com/echo -X POST -d text="Well hello" -d pid="42"
42 sent Well hello