allowed for the use of encrypted key files with decrypted keys being cached so passphrase only has to be entered once for multiple servers (if deployer uses same key file for all servers)
added an entrypoint loader to test development withuot installing
also shows usage text when no configuration file is present
allow recursive config value references, if a reference is used twice an exception is thrown
allows http basic auth with config values http_auth_user and http_auth_pass
Merge pull request #2 from sovaa/master

A few additions for usability