Parameter for npm registry; conditional `include nodejs`
Using `unless` over `onlyif test !` (double negative); better require
Removing Unix socket permission fix

This wasn't a permanent solution as Ghost cleans up the socket file on
shutdown. Also these permissions are 'correct', see #14
Updating `socket` to accept boolean value of true

Which when passed set in Ghost's config file will use the default socket
file of `${blog}/content/production.socket`.
Updating documentation
Indentation fixes for config template
Version bump