Adding 'no-http-ssl' support, and fixing 'no-public-ip' for stacks.

The same issue as cs_hosts.rb where it created the connection manually existed here.
It now uses the base to get its connection, and therefore honors the no-http-ssl flag.

There was also an issue where stack create did not honor the no-public-ip setting.

config[] was never actually setting the value, so it always tried to create a public ip and failed when it couldn't.