0.pre8.104:

0.pre8.104:
    * src/code/toplevel.lisp: Add special variables to convert SB-IMPL::REPL
      into a recursively invokable funcion
    * src/code/debug.lisp: Add hook for SB-DEBUG::DEBUG-LOOP
    * contrib/sb-aclrepl/tests.lisp: add tests for bignum inspection
    * contrib/sb-aclrepl/repl.lisp: convert to use new SB-IMPL::REPL function,
      add some debugger commands
    * contrib/sb-aclrepl/debug.lisp: use SB-DEBUG::*DEBUG-LOOP-FUN* hook.
      however, hook is not yet enabled by default  while debugger function
      continues development.