[rosalind] add initial docs for iev example
[rosalind] add initial docs for iev example

stmuk/perl6-examples,shlomif/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,Quinny/perl6-examples,Quinny/perl6-examples,stmuk/perl6-examples,perl6/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,stmuk/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples