XSB Src (SVN)-old

Changes to ignore meta_predicate/1 declarations (for compatabilty with
other Prologs).

Fiddling around w. placement of statistics/2

Added dialect flag along with statistics/2 for runtime and walltime

Documented table and table-as directives.

Fixes so that we can now make either mt or seq XASP

Updated private_conset to use new trie structures (conset no longer
used so that XASP can be multi-threaded)

Fix minor problem with read error handling when term contained a "string",
in which case it would fail without a message, when atom_codes failed on
the structure.

Modified slightly when to force string_gc, so that instead of forcing
string GC whenevery the string space expands 4-fold, to do it only if
the assert space isn't also expanding. Was finding that for large loads,
unnecessary string GC's were taking half the load time...

Fixed bug in printing warning message, when module is usermod, since
now psc_data may be a string.

airplane hacking -- making the executable table directive behave the
same as the compiler declaration.