Get rid of our PSR autoload

Let's use autoload provided by composer since it's here and in the spl_autoload stack anyway...
Impoved doc and formating
removed test code
Improved doc & formating
Moved synopsis to 'controller' class
Usage of composer autoload
Removed ficture conf
Using Ulrichsg\Getopt instead of native PHP, moved input parsing responsability to Io
ignore a bash shrotcut to phpunit
Updated tests
Tests for FileSystem input