Just execute the registration of why3ml format thanks to linkall

It is the sub-package why3.ml for ocamlfind.
The directory lib-ocaml/why3 is a local version of /usr/lib/ocaml/why3.

Don't work for Win32 but that keep the possibility for Unix.

blocking_semantics3.mlw
blocking_semantics4.mlw
wp2.mlw
wp_total.mlw

Change session serialization so that element ordering no longer depends on hash values but on actual values.

Move the Fset.nth function into its own theory, as it causes smt provers to fail on queens.mlw and bellman_ford.mlw.

Fix the naming of the symmetric conjunction and document the splitting behavior of the asymmetric disjunction.

Fix some documentation typos. Add an empty line at the end of replayer_macros.tex to work around a bug in hevea's lstlisting implementation.