Update README with link to kind

[steeling]

There were no links to kind in the README prior to this PR

[google-cla]

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[steeling]

@googlebot I signed it!

[codecov-commenter]

Codecov Report

Merging #212 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #212   +/-   ##
=======================================
  Coverage   37.23%   37.23%           
=======================================
  Files          33       33           
  Lines        1402     1402           
=======================================
  Hits          522      522           
  Misses        790      790           
  Partials       90       90           

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