Auto-update translations from transifex
Merge branch 'master' into develop
Reformat code according to PSR-1/PSR-2
Introduce phpmd.
Switch to PSR-4 style directory structure.

The custom class loader already supporting this kind of loading, because
it just refer the __DIR__ path to include other classes in the same
namespace.
Now the directory structure is changed to match the PSR-4 style.
Do not add composer.lock and composer.phar to repository.
Remove Dominik Zogg as maintainer.

Dominik is no longer an active maintainer of the project. We thank
Dominik for his efforts and wish him every success.
Rename project to contao-community-alliance/composer-client.
Add composer validate CI test.