Add jolici binary to composer.

This provides the ability to install using composer rather than by
downloading the phar.  The binary file will be placed into a user-global
area where it can easily be accessed.
guzzle/streams#8 - might need us to update docker-php's dependency on guzzlehttp/streams as well (it's also pointing at dev-master).

dev-master causes issues with composer's minimum-stability flags making it difficult to pull in projects with dev-master dependencies.