Summary: Autobox methods to transform Arrays and Hashes

Description:
'autobox::Transform' provides high level autobox methods you can call on
arrays, arrayrefs, hashes and hashrefs.

Transforming lists of objects vs list of hashrefs
'map_by', 'filter_by' 'order_by' etc. (all methods named '*_by') work
with sets of hashrefs or objects.

These methods are called the same way regardless of whether the array
contains objects or hashrefs. The items in the list must be either all
objects or all hashrefs.

Maintainer: tv