docs: make docstrings consistent

[Dimundel]

Affected files

bensemble/calibration/scaling.py
bensemble/losses.py
bensemble/layers/conv.py
bensemble/layers/linear.py
bensemble/search/selection.py
bensemble/core/ensemble.py
bensemble/methods/laplace_approximation.py
bensemble/utils.py
bensemble/diversity/dropout.py

closes #26

[gitnotebooks]

Review these changes at https://app.gitnotebooks.com/intsystems/bensemble/pull/29

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.44%. Comparing base (9f8482b) to head (cd38d49).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #29   +/-   ##
=======================================
  Coverage   95.44%   95.44%           
=======================================
  Files          24       24           
  Lines        1185     1186    +1     
=======================================
+ Hits         1131     1132    +1     
  Misses         54       54           

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