XSB Src (SVN)-old

Minor change to handle unsigned arity more cleanly/simply.

uncommented xsb_patch_version in version.sh because otherwise the version string looks ugly (has a trailing dot).
Maybe somebody would want to fix that but until then xsb_patch_version shodn't be empty.
Updates related config files, which are generated by configure.

Recoded nec_different_xwam_files to be simpler and not use
raw integers where clearer options are available (as Michael suggested.)

Minor casts or change of decls to eliminate warnings from MSVC.

table_once is now opaque.

Fixed some old tests to represent actions of large arity terms (some tests succeed now, rather than throwing erors)
and added a couple of new ones.

New test for large_arity terms on builtins.

max_arity flag is now 2**16.

Forgot this one.

Just caught a couple of typos. Have not updated for large arity terms.