Add Polyjokes example

[dcampogiani]

@raulraja proposed to add it to tutorials and blogs section.

Is this the right page?

[codecov]

Codecov Report

Merging #1071 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##             master   #1071   +/-   ##
========================================
  Coverage      42.6%   42.6%           
  Complexity      746     746           
========================================
  Files           359     359           
  Lines          9867    9867           
  Branches       1078    1078           
========================================
  Hits           4204    4204           
  Misses         5347    5347           
  Partials        316     316

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[raulraja]

Thanks!