[ENH]Lookup errors now abortable

[Brian T Rice]

I spent a little time hacking in an error-handler that asks a little y/n
question on whether you want to abort an evaluation when a method lookup
fails. This is incredibly useful when using the system interactively, as
you don't have to enter the lisp debugger when you make a simple typing
mistake.

Since this usually requires you to re-load the libraries, I'm sure
everyone who's tried it out will appreciate not having to do that. Now, in
general you should avoid this on fileIn's, since it will leave it
half-evaluated, and I'm not sure how safe that is. But for
experimentation, it saves a lot of time. As usual, CVS Update and enjoy!

-- 
Brian T. Rice
LOGOS Research and Development
mailto:water at tunes.org
http://tunes.org/~water/