Update phpdotenv to 1.0.9
Require PHP 5.4

Although there is no hard requirement on this, 5.3 should not be
"allowed" since it's reached end of life and isn't even supported
anymore.
Updates to default deploy.rb config

`linked_files` and `linked_dirs` updated to match official Capistrano
defaults. This allows plugins to set these variables as well.
Use WordPress composer package
Merge pull request #119 from roots/use-wordpress-package

Use WordPress composer package
composer.json update