Added banner to readme and index docs

[TomHAnderson]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.56%. Comparing base (4bb3429) to head (1bba454).
Report is 3 commits behind head on 2.0.x.

Additional details and impacted files

@@            Coverage Diff            @@
##              2.0.x      #81   +/-   ##
=========================================
  Coverage     90.56%   90.56%           
  Complexity       39       39           
=========================================
  Files            16       16           
  Lines           106      106           
=========================================
  Hits             96       96           
  Misses           10       10           

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