Use ssl instead gen_tcp to accept policy file requests via ssl and wait for <policy-file-request> event.
Fix connecting to policy-server node via rake task.
Test whether certificate and key file exists during startup and add script to generate self signed certificate.

WARNING: The self signed certificate will can be used only for testing. It will not be accepted by
Flash Movies sending the policy file request. It may work if the certificate is added to the
truststore locally. For production use a valid certificate.
Make name of certificate and key file configurable and add optional options to configure intermediate certificate and key passphrase.
Add command to policyserver script to test policy file response via ssl connection.
Update README with details about certificate configuration.