* NEW: Finish the List class
* NEW: Add List.Clear(). How could I go without since now?
* OPT: FYI, Current and enumerators remain relative to the _beginning_ of
the list if they're removed in order to can access all elements in an
enumeration.
* NEW: Return NULL for an invalid List.Current instead of raising an error.
However, the attempt to remove an invalid Current still results in that
error.
git-svn-id: svn://localhost/gambas/trunk@5403 867c0c6c-44f3-4631-809d-bfa615b0a4ec
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