- add asdf:test-op to the cffi system
- mark a couple more cmucl failures
- get rid of the warning in libtest.c about comparing void* and
  function pointer

- Makefile: new test-scl target. Add SCL's fasl file extensions
  to the clean target.
- Remove SCL TODO item.
- New file: cffi-scl.lisp.
- New primitive type :long-double. Since it's only supported by
  SCL, it's not worth adding a no-long-double feature just yet.
- New tests for :long-double.
- Add information about SCL and the new :long-double type to
  the user manual.

- Renamed :cffi/no-foreign-funcall and :cffi/no-long-long to
  cffi-features:foreign-funcall and cffi-features:long-long respectively
  (with the opposite meanings of course).
- Also new features (in the cffi-features package): darwin, unix, windows,
  ppc32 and x86. More could be added. The cffi-sys backends are
  responsible for pushing these features.

- Refactoring of the type translation mechanism, now based on
  generic functions. The only user-visible changes is that you can
  now specialize the on the argument of the translator, and there's
  no type argument now (which was useless too for user-defined types).
- Don't export define-type-spec-parser since it's useless on its own.
- The anonymous :enum type is gone.
- Updated manual.

- New tests: tests/enums.lisp (4 tests) and tests/misc-types.lisp (3 tests).
- New file: objects.lisp, skeleton of the safe typed pointer interface. I
  also added a :boolean type here, it's looking for a better home still.
- (early-types.lisp): type parsers, DEFINE-TYPE-SPEC-PARSER and PARSE-TYPE.
  Added abbility to have anonymous types (ie. a name is no longer required
  for FOREIGN-TYPE). Moved DEFCTYPE to types.lisp.
- (enum.lisp): improved DEFCENUM, the values for each keyword are now
  optional, like in C. Added the anonymous type (:enum ...)
- (types.lisp):
    - Renamed :TO-C-ARG to :TO-C-DYNAMIC.
    - Renamed FOREIGN-AREF to MEM-AREF and implemented compiler macros
      for it.
    - New exported macro: DEFINE-FOREIGN-TYPE for parameterized types.
    - Change DEFINE-TYPE-TRANSLATOR back to the previous interface,
      translators take a type argument now and we have translators
      available at runtime now too.
    - FOREIGN-TYPEDEF's now inherit their parent type's translators.
    - New :wrapper type, for anonymous typedefs with translators.
- (strings.lisp): Renamed string to :string. Added new type, :string+ptr.
- (utils.lisp): renamed let-if to bif.
- (tests/callbacks.lisp): two tests were not being run for SBCL
  because I thought it triggered a bug but it's actually only one that
  triggers the bug. Fixed that.
- Updated examples and tests to use :string instead of string.

- Move #-cffi/no-foreign-funcall from cffi-tests.asd to
  tests/funcall.lisp and have the lisps that don't support this
  push the feature in cffi-<lisp>.lisp instead of defpackage.
- New file: utils.lisp
- Make Allegro, CMUCL, Corman and OpenMCL use callback-symbol-name  (from cffi-utils) to safely intern callback symbol names (James)
- Clisp: consider (pointerp NIL)

- A few bugs and issues left, fails 5 tests. (the tests
  won't run automatically because Corman Lisp binds
  *load-truename* to NIL, so the code in tests/bindings.lisp
  doesn't find the C test library).

Very preliminary Lispworks support.
Calling foreign functions is not implemented, and will probably require
vendor support as a necessary primitive does not seem to be exported.

Add foreign enumerated types that automatically convert from keywords
to integers when passed or returned to/from foreign functions.

Clean up CLISP support some, will need CVS version of CLISP to properly
handle looking up symbols in all loaded foreign libraries.

Add preliminary support for CMU CL (tested in 19b-pre on OS X).