Provides a macroexpand-all function that calls the implementation specific equivalent. This small library is one way to deal with the fact that the ANSI Common Lisp standard does not provide quite enough facilities to do completely reliable code walking.

Supported Common Lisp implementations: `abcl`, `allegro`, `ccl`, `clisp`, `cmucl`, `corman`, `lispworks`, `mkcl`, `sbcl`, `ecl` & `scl`.