0.8.20.1: fun-name fun, debugger debugged

0.8.20.1: fun-name fun, debugger debugged
           * fix bug 32: print closures as #<CLOSURE name-goes-here>.
           * fix bug 33: better inspection of closures
           * remove bug 60: LIST-LOCATIONS has been deleted at some
              point in history, no point in keeping a bug about it.
           * move to using structured function names: (XEP FOO), etc
              instead of "XEP for FOO". Ditto for component names.
           * unless SB-DEBUG:*SHOW-ENTRY-POINT-DETAILS* is true
              display various entry points in backtraces as if they were
              "normal functions", and adjust the argument list accordingly.
           * fix for debugger I/O style issues: use *DEBUG-IO*, not
              *STANDARD-OUTPUT*.
           * use INTERACTIVE-EVAL in the debugger instead of reimplementing
              it.
           * update debugger documentation.