Add project to packagist

[thom8]

Would be nice to be able to add beetbox as a composer dependency.

As a start it could include a simple installer script which just adds the project Vagrantfile to the project root.

This could be extended to create the config directory and include "profiles" via composer extras. for example :

"extra": {
  "beetbox": {
      "profile": "acquia"
  }
}

or potentially add custom config via composer.json ...

[pendashteh]

Finally! @thom8 we already have "beet" on packagist if you want to use it.

[thom8]

Fixed via #365