Added first part of the Perl implementation
Added second tests for when one number exists in the list
Added test where there are two numbers and they collide
Added testcase where two numbers exist and they do not collide
Refactoring - collapsed some branches into one
Added test for colliding numbers where smallest is not first element in list
Refactoring - specific matching subroutine
Added testcase for 3 numbers where none collide. WOOTB