Event trigger returns 404 caused by double / characters

[benw-pusher]

The absolute_url assumes that the self.path is not prefixed with a /, however this is not the case. This causes a connection string of: http://api-mt1.pusher.com//apps/...

https://github.com/leggetter/pusher-examples/blob/1696a2d85f6a973574a6fa48e85ddb0b28e925f5/python-gae/src/pusher/init.py#L100

https://github.com/leggetter/pusher-examples/blob/1696a2d85f6a973574a6fa48e85ddb0b28e925f5/python-gae/src/pusher/init.py#L37

This returns a 404 error

pusher response: host=api-mt1.pusher.com status=404 404 NOT FOUND

Removing the double / character resolves the issue.