Kelbt

The sentinel at the top of the stack now needs to have its pointers initialized.

Line directives are now generated for inline code
blocks which are passed through to the output
file. Access to the production non-terminal
element and the right-hand side elements is now
supported in final actions. A priority mechanism
for explicit control of conflicting actions was
added. This is useful in select instances for
overriding the "innermost" nature of ordered
choice and obtaining an "outermost" strategy.

The program no longer generates a line of code which writes 'parse error' when parsing fails. This can be done by the caller of parseLangEl after looking at the return value. The scanner is now a class. It tracks the current line and guards against passing tokens to the parser if no parser name has been given.