Added hard and soft Kmeans clustering with tests#71

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kenluck2001 wants to merge 2 commits intoddbourgin:masterfrom kenluck2001:kmeans_hard_soft

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Commits on May 27, 2021

Added hard and soft Kmeans with tests tests
kennex2004
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Commits on Sep 25, 2021

fix bug in soft kmeans
kennex2004
committed