chore(docs): add a long description to PyPi

[mikejgray]

partially fulfills #390

[JarbasAl]

with #411 maybe #390 can be closed? unless someone wants to give the readme another pass

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.71%. Comparing base (c5cc475) to head (65cf8e7).
Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #429   +/-   ##
=======================================
  Coverage   66.71%   66.71%           
=======================================
  Files          15       15           
  Lines        2584     2584           
=======================================
  Hits         1724     1724           
  Misses        860      860           

Flag	Coverage Δ
unittests	66.71% <ø> (ø)

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