Log Message:
The Lemon program is an LALR(1) parser generator. It takes a context
free grammar and converts it into a subroutine that will parse a file
using that grammar.

Lemon is similar to the much more famous programs "YACC" and \ 
"BISON".
But lemon is not compatible with either yacc or bison.

There are several important differences:
* Lemon using a different grammar syntax which is less prone to programming
   errors.
* The parser generated by Lemon is both re-entrant and thread-safe.
* Lemon includes the concept of a non-terminal destructor, which makes it
   much easier to write a parser that does not leak memory.