[test] Add a test for mapcar
[test] Remove comments about EQUAL not being properly defined for lists
[test] Add tests for CONS, CONSP, ATOM, RPLACA and RPLACD
[test] Remove debug print from MAPC test
car and cdr variants: order definitions properly, remove duplicates and add missing ones
Merge pull request #90 from abeaumont/master

Improvements to various lists functions