XSB Src (SVN)-old

added new files

Allow qualified table names (requires 3 parts, separated by periods (.))

Removed trailing blank lines.

Flags are now copied into threads

Working version of the multi threaded engine - available for knowledge of developers only

added tests

took care of egcc, kgcc and friends

Extended index/2 to work for assert-type indexing by giving a 0
hash-table size, which is interpreted by index/3 as default size.

Change added to delete_return so that negation-failure simplification
is properly performed.

Test added for combining delete_returns and simplification.