Roundrobin

Changes in a packaging stuff - extend manifest to build without any warnings

**Full Changelog**: https://github.com/linnik/roundrobin/compare/0.0.3...0.0.4

Changes in a packaging stuff

What's Changed
* Add LICENSE to source distributions by bollwyvl in https://github.com/linnik/roundrobin/pull/2

New Contributors
* bollwyvl made their first contribution in https://github.com/linnik/roundrobin/pull/2

**Full Changelog**: https://github.com/linnik/roundrobin/compare/0.0.2...0.0.3

Added:
- Python 2 support
- slots optimization
- some code cleaning
- Travis CI config

What's Changed
* Use __slots__ in ItemWeight by Bobronium in https://github.com/linnik/roundrobin/pull/1

New Contributors
* Bobronium made their first contribution in https://github.com/linnik/roundrobin/pull/1

**Full Changelog**: https://github.com/linnik/roundrobin/compare/0.0.1...0.0.2

Initial release with all basic roundrobin utilities - basic, weighted, smooth.