[euler] add tests for problems 288, 329 and 539
[euler] add tests for problems 288, 329 and 539

shlomif/perl6-examples,shlomif/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,perl6/perl6-examples,perl6/perl6-examples,perl6/perl6-examples