- constructor should pass the args through the accessors, accepting a list of
  key value pairs, keyed by field, for the layout.

- next/super etc -- methods must be MRO aware - this required a split into
  ::Compiled much like attr is right now.

- Emitter TODO
	- foreign dispatch types must be dispatchable via ->meta calls, i guess
	- use a comparative-merge approach so that foreign MROs can still work
	  (depends on next/super)
	- do roles get emitted? we need something for disambiguation... I guess
	  stubs are skipped, but aside from that methods (including accessors)
	  should get created, with accessors getting a null target.
	- exclude subs who come from elsewhere from the dump (imported routines,
	  etc). Talk to demerphq about this.

- Perl::Generate based slot/accessor incest

- Array based layouts

- option for vtable based dispatch (as opposed to named)

- refactor MO::Compile::Class to be pluggable:

	precendence list based enumartion:

		MO::Compile::Enumera(ting|ble)

			get_all_using_* combinators

			this require ordering for sub extractors via extra methods

	interface composition:

		private / public interface merging (easy)

		multiple public interface merging (harder - declare which extractors shadow?)

	meta-instance data:

		attribute merging, field extraction, layout helpers

		method merging

- Abstract roles for top level objects (MO::Compile::Concept?) and sub objects
  (MO::Compile::Element?) (split to two levels?)

- Split MO::Compile::Aux from MO::Run::Aux to improve load times (the PMC
  compilation shit doesn't have to be in runtime).

- Also consider removing 'use warnings' as it nearly doubles the load time
  right now (from MO::Run::Aux for runtime support and MO::Emit::P5 for
  serialized code refs).