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.
guzzlehttp/streams is also pointed at dev-master.  Can that be changed to ~1.1?  Or are there changes [since then](https://github.com/guzzle/streams/compare/1.1.0...master) that JoliCi needs?