XSB Src (SVN)-old

Fixed two small bugs in abolishing incremental tables when cps to completed incremental tables are in the cp stack
Improved debugging group for table abolishes

-- Changes to ensure that trie_fail, used by incremental tabling, is recognized as a trie instruction by the table abolishing routines
-- tc_insts_xsb_i.h changed to turn on and off debugging.

Recent changes broke MT compilation, which I fixed.

Changed defn of ?=/2 to avoid laying down a choicepoint.

A number of documentation changes, mostly suggested by Ulrich Neumerkel,
having mostly to do with ISO issues.

Changed format spec to agree with variable type.

Moved xsb_sprint_variable, since for some reason DllExport didn't
seem to work for it on MSVC32 compiler over in builtin.c.

xwam update

Added a note of documentation about something that confused me. No change to .xwam

Fixed typo-based bug in partial forest logging.