Django Dia Versions Save

This also breaks older django & py2

This removes hyphen in package name as a first step to support fresh django versions After this release all legacy/compatibility stuff will be removed (e.g. six module)

Much more internal details are tested now, thus we can guarantee more consistent output for different django versions and track changes in django easier. Code have been split into several modules with isolation of responsibilities.

• migrated to new arguments code available starting from django 1.8
• fixed appnames
• python wheels adopted

Thanks to @encolpe, now we have django 1.9 support!