Move __version__ to _version.py.

- Fixes installs with Django 1.5 in the environment.
- Steal get_version in setup.py from elasticutils.

Use statsd.__version__. v2.0.0

Update docs version.

Version bump for IPv4 and floats.

Link to RTD. Update CHANGES.

Version 0.4.0.

- Update included text files.
- Add AUTHORS and CHANGES.

Version bump for big deletes.

New feature -> new version.

version