adding ruby-dev as a dependent package
Fix incorrect attribute key in php template

- Change to use `smtp-port` as `port` is not currently defined in
  `defaults.rb` and the documentation lists `smtp-port` as the correct
  key
Merge pull request #13 from mkly/fix_php_smtp_port_template

Fix incorrect attribute key in php template
Merge pull request #11 from zarry/master

adding ruby-dev as a dependent package