111.949MHz/1A86 Improved meta-compiler in embed/

* The meta-compiled system in 'embed/' has been much improved, it is
nearly ready to replace the current cross-compiler, which is great as it
is much closer to a self-hosted system.
* Size of the system for 'embed.hex' is '19AC', which offers nearly the
same functionality - it is missing a few test functions and features,
but adds its own (it includes an 'editor').