The lifetime of the StringIO object is really short, no need to use the
high performance version

- Replace sys.stdout and sys.stderr with a regular file
- Look for XML schemas in the resources directory

Patch by Michiel Leenaars

- build an architecutre dependent package
- add build dependency on cython
- add build dependency on libvncserver-dev
- add runtime dependency on x11vnc

- include build_inplace
- include cython files
- exclude cython generated C files