Proposal: DispatcherInterface

[zf2timo]

This pull Request introduces a "DispatcherInerface" for the easy exchange of the dispatcher with own implementations.

In my project I have a plugin manager that provides me the commands. To integrate this into the dispatcher, it was only possible by inheritance, which has led to some difficulties.
The interface would have been easier.

<?php

$commands = [....];
$commandManager = new CommandManager($commands);
$commandDispatcher = new CommandDispatcher($commandManager);
$application = new Application(
        'FooApp',
        '99.0.0',
        [....],
        null,
        $commandDispatcher);
$application->run();

// ...

I also thought about to mark the dispatcher as final, but that would mean a BC break, which is why this will be done at a later date.

Thoughts?

[weierophinney]

Thanks, @zf2timo !