Broken Intervention/Image library

Hi Peter,

I just updated a client site with various of your extensions (rereplacer, articles anywhere, modules anywhere, conditions, extension manager) and that cause a 500 on the frontend. I traced the issue down to the scoped intervention/image package that you ship in your library folder. You are using a scoped namespace to avoid collisions, however you overlooked a couple of places where that namespace is referenced within the actual runtime code, i.e.

* ImageManager.php, line 94 - that's where the classname of the supported driver is being built
* AbstractDriver.php, line 102 + 103 - that's where the availability of a given command is checked

After patching the namespaces in these locations, the site started to work again.

Cheers,
David

Looks good, thank you!