Add a readme for import validator

[tolikzinovyev]

No description provided.

[codecov-commenter]

Codecov Report

Merging #811 (86d2da4) into develop (0f3254b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #811   +/-   ##
========================================
  Coverage    59.17%   59.17%           
========================================
  Files           32       32           
  Lines         4108     4108           
========================================
  Hits          2431     2431           
  Misses        1379     1379           
  Partials       298      298           

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[algobarb]

Thanks!