0.7.9.6:
Fix bug 185 (top level forms at the REPL)
... implement a LOCALLY method for EVAL-IN-LEXENV
... factor out MACROLET-DEFINITIONIZE-FUN and
SYMBOL-MACROLET-DEFINITIONIZE-FUN from the IR1
translators for same
... implement SYMBOL-MACROLET and MACROLET for EVAL-IN-LEXENV
in terms of said DEFINITIONIZE-FUN macros and LOCALLY
... set compilation policy in make-target-2 to avoid file scope
limitations
... set interaction policy by hard-coding it in
MAKE-NULL-INTERACTIVE-LEXENV
... throw it together and hope it all still works.