Builde BNF intermediate files in Rakefile.
Use LL1::Parser version of debug, and call directly.
From script/parse, remove lex-onlly and parse-only options.
Add --quiet twice to suppress "." output.
Version 1.0.3, using ebnf 0.2.3. This uses a new capability to reset the parse state when a new statement is processed, dramatically shrinking stack usage for large input files. This fixes issue #2.