debugging stuff
fix search for free variables in bagof.
Merge branch 'master' of ssh://yap.git.sourceforge.net/gitroot/yap/yap-6.3
fix setof bugs
exo support
exo
update to newer pl-file.c and pl-write.c.
iupdate buffer.
check for enough head space
SWI update
SWI update
Merge branch 'master' of ssh://git.dcc.fc.up.pt/yap-6.3
SWI update
Merge branch 'master' of ssh://git.dcc.fc.up.pt/yap-6.3
SWI portability
SWI portability
SWI extension including write variable_names
thread support
fix history
atom completion in readline