See also <https://git.ngyro.com/mes/log/?h=wip-gash>.
* gash/pattern.scm (<pattern>): Use 'define-record-type' instead of
'define-immutable-record-type'.
* mes/gash.mes: Add a bunch of shims; run 'guile --version'.
* gash/lexer.scm (operator-prefix-char?): Avoid using
'match-lambda': it seems to confuse Mes.
* gash/parser.scm: Replace '(eof-object)' with 'the-eof-object';
replace 'let-values' and 'let-values*' with 'receive'.
* mes/gash.mes: New file.