Changes in YAP-5.0

Yap-5.0.2:

• FIXED: excessive backtracking in multifile declaration.
• FIXED: broken do_print_message for defined_elsewhere.
• FIXED: debugger option.
• FIXED: trace through undefined predicates correctly.

Yap-5.0.1:

• FIXED: WIN32 missing include files (untested)
• FIXED: -L trouble (my thanks to Takeyuchi Shiramoto-san)!
• FIXED: debugging of backtrable user-C preds would core dump.
• FIXED: redeclaring a C-predicate as Prolog core dumps.
• FIXED: badly protected YapInterface.h.
• FIXED: break/0 was failing at exit.
• FIXED: YAP_cut_fail and YAP_cut_succeed were different from manual.
• FIXED: tracing through data-bases could core dump.
• FIXED: cut could break on very large computations.
• FIXED: first pass at BigNum issues (reported by Roberto).
• FIXED: debugger could get go awol after fail port.
• FIXED: weird message on wrong debugger option.