defining CLOS package conflicts in some implementations with built-in package CLOS

[lispm]

defining a CLOS package usually is not a good idea, since many Common Lisp implementations will already have one...

see package.lisp

[thicksteadTHpp]

It's my plan to get rid of it. This clos package was necessary because of the original obvius implementation used a very early implementation of clos. This early impl. didn't have all the function defined in the standard.