Improve setup.py
get_required_version does not need to use .dev0 suffix anymore. The download URL must be empty for development version. Source Code must point to Heptapod repository. Foundation email is used as author email.
get_required_version does not need to use .dev0 suffix anymore. The download URL must be empty for development version. Source Code must point to Heptapod repository. Foundation email is used as author email.