Add plugins in composer autoload file list

[ricardotulio]

What this PR do?

Force to declare plugin classes adding source files into file list of autoload section in composer.json.

What this PR solve?

The plugins are loaded dynamically using get_declared_class function. The problem is that these class will never be until be used.

This commit just add this files in composer autoload files to be declared when autoload.php be included.

This problem was referenced in #20

[marciol]

I think that this approach leads to a more explicit code, allowing us to reason more directly about the dependencies, at least it is what I learned from the past experiences in software development. Less magic leads to more maintainability.

[renatocassino]

Hello @ricardotulio
Sorry for my delay, I'm reviewing your PR now. Thanks for this :D

I agree with this solution. I this that is better keep plugins in composer.json file.

But, i have a question. In this solution can I remove the Reflection Plugin?

[ricardotulio]

Hello @tacnoman, no, because Reflection Plugin will use get_declared_class and set it. In my opinion, it could be removed, but in another PR.

Add this files into composer.json just make this class declared, so Reflection Plugin can find it. In another way, the composer autoload just will load when someone try to instantiate, so Reflection Plugin will never find some plugin class.