i18n: Add German translation

[Tobias Bell]

Hello Georg

>>   msgid "use 'hg resolve' to retry unresolved file merges\n"
>>   msgstr "Nutze 'hg resolve', um nicht zusammengeführte Dateien erneut zu versuchenn"
>
> If the rest of the translation is equally confusing, it shouldn't be accepted.

You're right. This is far from perfect. We started a patch queue on
Bitbucket (http://bitbucket.org/tobidope/i18n-german-translation) to
improve the quality. How would you translate the sentence "to retry
unresolved file merges"?

> Georg
>

Tobias