XSB Src (SVN)-old

... forgot to update the index.

Mostly minor changes to incremental tabling section to change names from _update to _immed

Change all incremental calls to lazy (inval) ones.

Somehow this one didn't get removed.

Added test for throwing over nonincremental tables, and moved another incremental tabling test from table_tests to
incremental tests (incremental tests are presently not executed by the MT engine).

Adding abolish_incremental_table_single/1 as a Prolog predicate (though its probably best used in libraries, rather than
for general use.

Created abolish_incremental_tables_single, mostly for internal use.

It turned out that when throwing over incremental tables, not all stuff was being cleaned up and we would sometimes
get core dumps. Replacing abolish_incr_table in throw with abolish_incremental_table_single fixes the bug.

Took out spurious hashtable_destroy. Shouldn't make a difference, but it shouldn't have been there.

clarifications, typo fixes

Added documentation for abolish_nonincremental_tables/1.