XSB Src (SVN)-old

gcc 5 doesn't like inline extern functions. XSB won't link.

A bunch of minor fixes. Some declarations not at beginning of block
moved there for MSVC. Changed completion flag to use bits rather than bytes
in possible preparation for answer_complete flag. Some format fixes.

Fix minor bug in handling of fold aggregate indicator.

Handled predicates used in aggregate declarations more consistently with
other uses. Improves compile warnings.

Imported '.'/2 from consult for aggregations that use lists.
Quiets compiler warnings (when aggregate is in a module) but I
doubt it has any other effect.

Added a couple of sentences about timed call and break levels.

Made timed_call work with breaks.

Added cancel_sleeper_thread for making timed_call work with XSB/Ergo break.

Updates for timed_call additions.

added quotation to Windows paths so that pcre/curl/xpath packages could work for the cases when XSB is installed in directories that contain spaces.