Add new style for journal FinanzArchiv

The style guide requires:
<cite>Journal names should appear without first articles, i.e., “Quarterly Journal of Economics” rather than “The Quarterly Journal of 
Economics”</cite>
which is AFAIK not possible in CSL. Otherwise everything should be implemented as they want.
Merge pull request #1115 from zuphilip/finanzarchiv

Add new style for journal FinanzArchiv