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simple tests of u_not/1.
Added doc for u_not/1.
Perturbations from change to allow dynamic tabled predicates w. abstraction.
Changes to allow dynamic tabled predicates to use abstraction.
Forgot a couple of CTXTc's
slightly updated windows install
tests for predicte-level specification of answer + subgoal abstraction.
Support for predicate-level specification of subgoal + answer subsumption.
Support for predicate-level specification of subgoal and answer abstraction.