lib/ cleanups
POD
Make it possible to pass in class names to use ::Autobox

Tested but undocumented, see caveats in comments.

	modified:   lib/List/Objects/WithUtils/Autobox.pm
extended t/00_loadable.t
POD
v1.003000

  Add 'use Lowu;' shortcut to import all available functionality.

  Add autoboxing support via List::Objects::WithUtils::Autobox and
  make autoboxing available via "use List::Objects::WithUtils 'autobox'"
  (as well as the 'use Lowu;' shortcut)

  More flexible import() in List::Objects::WithUtils; allows for exporting
  selected functionality to designated target packages.

  Added 'all'/':all' import tags to List::Objects::WithUtils;
  bare import list still just enables array/immarray/hash,
  'all' adds autoboxing.

  Add array()->export to line up with hash()->export.

  POD improvements.