v0.33 - mnemo replacement enhancements

Mnemonic replacements can be enhanced with some specialties bow - $(label), $(parm) and $(<<) have been added.
With that, the disassembler output can be tailored to quite a lot of different assemblers.
Still some work to be done until a truly universal redefinition is possible, but it's a good second step.

Attention: the documentation for the mnemo info file instruction is in the wrong place in the documentation; this is not an option, but an info file instruction instead.