Update docs

[plutasnyy]

Solves #59 and make docstrings consistent with reStructuredText

[codecov-commenter]

Codecov Report

Merging #60 into develop will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop      #60   +/-   ##
========================================
  Coverage    97.25%   97.25%           
========================================
  Files           27       27           
  Lines         1603     1603           
========================================
  Hits          1559     1559           
  Misses          44       44           

Impacted Files	Coverage Δ
multi_imbalance/datasets/_data_loader.py	100.00% <ø> (ø)
multi_imbalance/ensemble/ecoc.py	97.89% <ø> (ø)
multi_imbalance/ensemble/ovo.py	96.19% <ø> (ø)
multi_imbalance/ensemble/soup_bagging.py	96.42% <ø> (ø)
multi_imbalance/resampling/global_cs.py	100.00% <ø> (ø)
multi_imbalance/resampling/mdo.py	95.40% <ø> (ø)
multi_imbalance/resampling/soup.py	95.29% <ø> (ø)
multi_imbalance/resampling/spider.py	97.91% <ø> (ø)
multi_imbalance/resampling/static_smote.py	100.00% <ø> (ø)
multi_imbalance/utils/array_util.py	93.33% <ø> (ø)
... and 2 more

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