Rocketeer Agnostic

Work in progress for Rocketeer Agnostic.

Currently a `rocketeer` file needs to be created at the root of your repository with the following contents :

```php
#!/usr/bin/env php
<?php
require 'vendor/autoload.php';

return Rocketeer\Commands\RocketeerConsole::makeAndRun();
```

And then `php rocketeer deploy:whateveryouwant`.