Completely switch over to token-based parsing.
Show the parsed tokens.
Get lexing precedence correct for identifiers.

Keywords must be attempted before the identifier rule, since keywords always
appear to be valid identifiers.
Add more debugging information to the parser.
Simplify comparison matches.
Make hello parseable again.
Enable line/column numbers in lexing and parsing output.
Remove newlines from operator list.

Not even gonna try.
Lex extra newlines after braces out of existence.