#38 More compiler output

[Amy Lear]

It'd be handy for the compiler to report other additional
things, such as any defined tokens (words, variables,
etc) that are created but never actually accessed in any
manner.

This is less useful for writing new programs than
maintaining existing programs written by another
author.. I realize this isn't the simplest thing but this,
along with my earlier request (for tracking $includes),
greatly simplifies the task of identify what a program is
(or isn't) doing.

This could reasonable go in either a log, in the compiler
output, or both.

Maybe yet another @tune or maybe a compile time
option?