Changes in YAP-6
Yap-6.0.7:
-  NEW: YAP_SetYAPFlag (request from Theo Mantadelis). 
 
-  NEW: support div/2 as per WG17. 
 
-  FIXED: restore from / file should just try that file. 
 
-  FIXED: bad things can happen to P when user code is called (obs
  from Ingo Thon). 
 
-  NEW: coinduction.yap. 
 
-  FIXED: remove leftover files including two lib*.a (obs from
  Bernd Gutmann).
 
-  FIXED: Make clean should result in recompiling all *.o (obs from
  Bernd Gutmann).
 
-  NEW: Ulrich Neumerkel's lambda library.
 
-  DELETE: ^/2 and ^/3 as grammar built-ins.
 
-  FIXED: make install in clpqr was broken if we used local install_sh .
 
-  DELETE: atan/2 arithmetic function, use atan2/2 instead (WG17).
 
-  FIXED: compilation in Solaris was broken because  of conflict in
  declaration of gethostname.
 
-  FIXED: acyclic_term/1 is now built-in (WG17).
 
-  NEW: subsumes_term/2 (WG17).
 
Yap-6.0.6:
-  FIXED: fix problems in indexing compiled bignums (obs from Jos de
  Roo), center hash computing code in TermExt.h.
 
-  FIXED: similar problem in unify_dbterm.
 
-  FIXED: bug in implementation of unify_bigint instruction (obs
  from Jos de Roo).
 
Yap-6.0.5:
-  FIXED: get rid of L constants (use cast).
 
-  FIXED: outputing inf and nan in WIN32/64 (obs from Paulo Moura).
 
-  NEW: WIN64 port.
 
-  FIXED: improve SWI frame handling.
 
-  FIXED: stack expansion could rewrite doubles and big ints.
 
-  FIXED: unsafe test for attvar could crash.
 
-  FIXED: rbtree doc (from Jan Wielemaker).
 
-  FIXED: trail marking should be careful to reset attvars to attvars.
 
-  FIXED: pl_function_t not function_t.
 
-  NEW: update sgml package to latest SWI.
 
-  FIXED: automatic generation of SWI atoms.
 
-  IMPROVEMENT: better emulation of SWI atom_t and functor_t. Now
they can be defined to be a constant.
 
-  FIXED: 64 bit complaints in Matlab interface.