Anpassungen der Formatierung im Literaturverzeichnis

\documentclass{scrbook}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[english,ngerman]{babel}
\usepackage[backend=bibtex,style=authoryear,babel=other]{biblatex}
\usepackage{hyperref}
\usepackage{filecontents}

% Anpassungen der Formatierung des LVZ
\renewcommand*{\newunitpunct}{\addcomma\space} %Nach jeder neuen unit ein Komma
\DeclareFieldFormat[article]{title}{#1} %Titel aller Articles ohne Anführungszeichen

\begin{filecontents}{literaturdaten.bib}
@article{Johnson(1999),
 author = {Johnson, David},
 year = {1999},
 title = {A title without a question},
 pages = {71--87},
 volume = {29},
 journaltitle = {Test Journal},
 hyphenation = {english},
 number = {3}
}

@article{Schmidt(2000),
 author = {Schmidt, David},
 year = {2000},
 title = {A question as a title, is that really necessary?},
 pages = {71--87},
 volume = {29},
 journaltitle = {Test Journal},
 hyphenation = {english},
 number = {3}
}

@article{Smith(2001),
 author = {Smith, David},
 year = {2001},
 title = {Eine Frage als Titel, muss das wirklich sein?},
 pages = {71--87},
 volume = {29},
 journaltitle = {Fachzeitschrift},
 hyphenation = {ngerman},
 number = {3}
}

@book{Meier(2010),
 author = {Meier, David},
 year = {2010},
 title = {My book title},
 publisher = {John Wiley {\&} Sons},
 hyphenation = {english},
 location = {New York, Boston und Los Angeles}
}

@book{Bauer(2011),
 author = {Bauer, David},
 year = {2011},
 title = {Mein Buchtitel},
 publisher = {John Wiley {\&} Sons},
 hyphenation = {ngerman},
 location = {New York and Boston and Los Angeles}
}
\end{filecontents}

\bibliography{literaturdaten}

\begin{document}
\cite{Meier(2010)}
\cite{Bauer(2011)}
\cite{Johnson(1999)}
\cite{Schmidt(2000)}
\cite{Smith(2001)}

\setlength{\bibitemsep}{5mm}
\printbibliography
\end{document}