Add -same-items? function.

The function returns true if both lists includes the same items, no
matter of the order of the items.
Merge pull request #65 from rejeep/same-items-predicate

Add -same-items? function.
Release 2.5.0
Set -each, -each-while and -dotimes indent levels to 1.
Merge pull request #66 from rejeep/each-indent-level

Set -each function indent level to 1.