
- add delegations for 'get', 'set' in all native attr traits.
e.g. bool has no 'get'.

- evals -> Test::Requires in t/000_recipes tests generated from pods.
 Search for DateTime::Calendar::Mayan to get started

- use Test::Requires?

- more native attr handlers:
    is_member -- pass in an equality sub that compares $_[0] and $_[1]
    first_index
    any, all, non, notall, true, false etc.
