* More but still incomplete support for mkcl and cormanlisp.

into the encodings feature. utf-8 is the default encoding and use :default
at your own risk. Anything else gets delegated to asdf-encodings.

Fix tests with SBCL, too.
Remove obsolete setup.lisp for good. We are in an asdf 2 world!

Fix build with xcvb wrt fare-memoization change.

copy-list before we destructively sort components.
Tweak build and package files.

as I was tired of completion conflicts with driver.lisp.

Move fake-release-directory to Lisp.
Fix enough-namestring in Makefile.

  and other types of related errors.
+ Changed all externals to be :asdf instead of :build.
+ tweak dependencies

allows full bootstrap of XCVB, including ironclad.
Disable nemk self-build from tests,
as there is no ASDF equivalent to :around-compile.
Also, fix a2x wrt latest ASDF's find-system and reuse of component objects.

c::builder'ing shared libraries.  Refactored the grain class hierarchy
a bit.

Fix list-files and export it to the command-line.
Fix version extraction in bootstrapped build.
Update documentation: document :executable. Remove ASDF1 crud.

+ Partial changes to get xcvb to build a binary of xcvb.
+ Extending :create-image to support executables.
+ Support for command line arguments when resuming the executable.
  These are passed to the entry-point. However, each lisp vendor
  mangles the argv a little and it needs work to be really right.
  For now it is good enough.
+ dump-image for ecl got hacked upon, but it is currently broken.
+ Changed example-1 to produce an executable, but currently this
  only works for lisp implementations which can produce them. This
  needs more consideration in the future, for example, the
  "executable" could be a script which invokes an image.
+ simple-build can now accept targets with empty computations.
  This implements the "phony target" idea in simple-build.

* extract fasl type from target:
 at least lispworks depends on pathname type and its fasl type varies!
* rucksack not available on clisp (and needed fixes; see our xcvb repo of it)
* accept compile-file failure semantics of clisp
* suppress duplicate entries for a directory in the source-registry:
 The first one wins, with its recurse and exclude flags.
* fix hello and test/runme
* fix various option parsing mistakes

Also, now that we're importing symbols from ASDF,
avoid redefining them due to a conflict. Oops.

Usually we don't need a backtrace when the user simply did the wrong
thing.

Try to make it work with gcl - but gcl fails to compile driver.lisp.

Rename search-path to source-registry, registry to grain-registry.
Extract ASDF implementation identifier from target, so we may use it later.

Unrot release and test scripts.
Tested: XCCL=stccl make test LISP=ccl

Notably fixed a typo in removing feature*s*, as noticed by Theam Yong Chew. Thanks!

Also, fix ssr with require supersession and fix xcvb-farmer conditionals.

My, that what much more painful than it ought to be.