private key / certs shouldn't be version-controlled

[shatterednirvana]

To properly support HTTPS, we shouldn't make the private key and certificate publicly available. We should have a rake task that automatically generates a pk and cert on a machine - the workflow I'm thinking is as follows:

"rake deploy" starts up appscake
this task depends on "rake cert", which does nothing if the cert/pk exists, and generates it otherwise

[hiranya911]

Fix for this issue is in the last pull request I've sent. I've removed the default certificates and introduced a keygen.sh which can be used to generate the SSL certs. This will be automatically invoked when starting AppsCake (if the certificates are not present in the system)