Fix package description (no need to state package name here).
Add requirements.

This is preliminary only.
Cleanup: pep8ifying sources.

This changes have been applied to all python files using
https://github.com/htgoebel/pep8ify and the result has been checked.
Fix she-bang line: call python via /usr/bin/env.

Prior to this change the interpreter's path  was hardcoded. Thus in a
virtualenv, the wrong interpreter was used if the script was called
directly.