Fixing directory-fold to return knil on non-existing directories.
Fixing file-regular?/directory?/... shortcut tests to return #f
for non-existent files instead of a confusing error.
Adding the -R<module> option to run "main" procedures directly from modules,
analogous to Python's -m.  With no argument, runs chibi.repl.
Don't warn on import redefining an undefined value.
Writing out syntactic closures in the simple writer.
make-syntactic-closure generates a copy of existing closures, to allow for syntax generated syntax.
Adding initial environment monad for use in combinator formatting.
Adding build rules for chibi/monad/...
Adding initial version of (chibi show) successor to the fmt combinator formatting library.
Adding customizable logging library with combinator formatting.
(chibi log) only needs (chibi show base), like most libraries which
provide a combinator formatting interface.