deleted more from react branch

app.py

pieces.txt

wiki/footer.html

wiki/layout.html

wiki/menu.html

wiki/pages/1templatepageempty.html

wiki/pages/attributions.html

wiki/pages/bfh.html

wiki/pages/contribution.html

wiki/pages/description.html

wiki/pages/education.html

wiki/pages/engineering.html

wiki/pages/entrepreneurship.html

wiki/pages/example.html

wiki/pages/experiments.html

wiki/pages/hardware.html

wiki/pages/home.html

wiki/pages/human-practices.html

wiki/pages/igembielefeld.html

wiki/pages/impressum.html