* module/mes/peg.mes: New file.
* module/mes/peg/cache.scm: New file.
* module/mes/peg/codegen.scm: New file.
* module/mes/peg/simplify-tree.scm: New file.
* module/mes/peg/string-peg.scm: New file.
* module/mes/peg/using-parsers.scm: New file.
* tests/peg.test: New file.
* GNUmakefile (TESTS): Add it.