Configure setup generation.

The installer this generates is very horrible but
it will do for now.
Add appveyor demo project code from https://github.com/ogrisel/python-appveyor-demo
Adjust appveyor configuration to our needs.

Use our requirements.txt file which now contains our
additional dependencies.

Remove all but the newest python 32bit entries from
the matrix. For now we don't need installers for
different architectures.

No deployment or similar steps yet.
Build with python 3.3 to work around cx_Freeze issue

See http://stackoverflow.com/questions/23920073/cx-freeze-error-python-34
Add appveyor badge to README.md