Adds some `use lib` example
Adds some `use lib` example

Which closes #2105. If the OP needs more clarification, please comment or reopen. Thanks for the report.

dmaestro/doc,MasterDuke17/doc,jonathanstowe/doc,MasterDuke17/doc,stmuk/doc,perl6/doc,dmaestro/doc,dmaestro/doc,perl6/doc,stmuk/doc,perl6/doc,jonathanstowe/doc,stmuk/doc,MasterDuke17/doc,stmuk/doc,tbrowder/doc,jonathanstowe/doc,dmaestro/doc,tbrowder/doc,jonathanstowe/doc,tbrowder/doc,MasterDuke17/doc,perl6/doc,perl6/doc,stmuk/doc,dmaestro/doc,jonathanstowe/doc,tbrowder/doc