drush-vagrant 7.x-1.0-alpha4

Release notes

This release adds commenting to the alias.tpl.php file and also outputs an opening <?php tag when printing the alias to the terminal.

It also updates the command that drush-vagrant uses from vagrant ssh_config, which was removed sometime before Vagrant 1.0 (probably 0.9) and uses vagrant ssh-config instead, which works in all versions of vagrant.