SRFI-119 supporting files

Bootstrap wisp using Python 3


This creates wisp-preprocessor.scm (the version in the tarball is called wisp-guile.scm to avoid overwriting it)
and wisp-parser.scm (the version in the tarball is called wisp-scheme.scm)


wisp-preprocessor.scm reads files in wisp-syntax and outputs generic scheme.

    usage: guile wisp-preprocessor.scm <wisp-file> > <scheme-file>

wisp-parser.scm provides procedures for reading s-expressions from wisp-files.