3.0 Doc/readme docs

[TomHAnderson]

Please prefix your pull request with one of the following: [FIX] [FEATURE].

Changes proposed in this pull request:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.22%. Comparing base (6ed3c7b) to head (37d3592).
Report is 3 commits behind head on 3.0.x.

Additional details and impacted files

@@            Coverage Diff            @@
##              3.0.x     #598   +/-   ##
=========================================
  Coverage     65.22%   65.22%           
  Complexity      522      522           
=========================================
  Files            74       74           
  Lines          1645     1645           
=========================================
  Hits           1073     1073           
  Misses          572      572           

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