[CM] cm-2.4.0, cross-refs in dictionary

[Rick Taube]

> embedding language. I'm impressed about your energy redoing everything
> more or less from scratch for the third time now.

this last time wasnt so bad,  it was a rewrite more than a redesign. and
with the translator i only maintain one set of sources -- it doesnt cost me
any extra effort to support scheme and cl at this point.

> In the dictionary, the cross-links don't seem to work. It's o.k. using
> the index. It seems, you had the dictionary split into different files

ill fix this in the next few weeks -- i also have to remove some stale
entries.