v2.005001

  - Add array->indexes() (from List::MoreUtils)

  - Add array->last_index, array->last_where

  - array->first moved to array->first_where;
    backwards compatible ->first remains for now, but may be
    eventually placed in a warn-then-remove deprecation cycle.

  - Add array->first_index (same as ->firstidx);
    these changes should add some sanity to first/last method naming
    (first_where, first_index, last_where, last_index)