Added german translation

[jonaswinkler]

This PR adds translation of django-q to German.

Some notes.

• The .mo files are generated artifacts and should not be added to version control.
• These files should be generated by django-admin compilemessages when building django-q / making a release.
• However, since the already existing french translation also included the .mo file despite being ignored in the .gitignore file, I've added this file as well, since not adding that file would require you to adjust release processes.

[Koed00]

Very cool. Danke vielmals.
Good spot with the .mo files. When I have a little more time in my schedule I'll see about rebuilding the messages when I build releases.

[jonaswinkler]

Good spot with the .mo files. When I have a little more time in my schedule I'll see about rebuilding the messages when I build releases.

Well, this is only an issue when you expect your translation files to change frequently, because at some point someone will forget to update that .mo file and the two files will get out of sync.