Elote

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* Many bugfixes
* Improved testing and documentation
* Added notion of history object and bout objects for arenas to track progress

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* No change, debugging CI

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* bugfixes in glicko expected score
* bugfixes in elo score that wouldn't allow ratings to drop properly
* added some testing and CI

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* initial release
* lambda arena added
* elo competitor added
* glicko competitor added