Setuptools-version-command

Version 99.9, end of the line for this project.

* Add deprecation warning to code
* Add deprecation notice to README
* Final bump of version

- Test using py.test
- Code improvements
- Remove restrictions on 'git describe' command (fixes issue 9)
- Add python3 compatibility (fixes issue 10)
- Add pep440-git-full mode (thanks to bbuesker)

- Universal wheel

- Make python3 compatible
- Remove useless limitation (thanks to mhsmith)

Changes:
- Update documentation
- Be more consistent with PEP440

Bug and documentation fixes