:HISTORY and :KILLRING to LINEDIT &co can now be pathname
  designators.

  I have no idea what I was thinking when I put the
  META-ESCAPE crap in there.

  Also delete a bunch of trailing whitespace.

 Use :IF-COMPOENNT-DEP-FAILS :TRY-NEXT in .asd for better system
 introspection.

 Add a "generic" port which only signals an error for INSTALL-REPL
 and UNINSTALL-REPL.