some parsers for k

• t transliteration of atw's k6 parser (gcc-only, effbiae)
• y yacc parser orthogonal to t (effbiae)
• c extended t (portable, bracket balancing, numerals, literals, strings)

make            # validate c<>t
make time       # benchpress t/c/y
make b          # test brackets
make bb         # test numerals
make bbb        # test literals
make bbbb       # test strings