Translate tutorial to German
completed by: Raphael M.
mentors: Aaron Meurer, Joachim Durchholz
Please see http://code.google.com/p/sympy/issues/detail?id=2766 for full information on this task.
Please read https://github.com/sympy/sympy/wiki/gci-2011-landing before completing any tasks for SymPy.
Additional Note(s): We only have one person available per language, so review may take a few days. Please contact us before starting a translation task, to make sure that someone is available to verify the translation.