Add a supplemental fact
I don't really like this fix, but hey...
IntensionalInheritance evaluation will work
Merge github.com:opencog/opencog
PLN doing 3 step inferences with variables
Fix the example that came with the SUMO test.
Add fields to AtomSpace publisher JSON types: avOld, avNew, tvOld, tvNew, handle, atom. Refactor message construction. Update unit tests.
Add subscription topics addAF, removeAF for when an atom AV changes and it enters or exits the AttentionalFocus
Update AtomSpacePublisher unit tests with new subscription topics
Update AtomSpacePublisher API documentation with new subscription topics addAF, removeAF. Update all topic message definitions.
Update AtomSpacePublisher API documentation with new subscription topics addAF, removeAF. Update all topic message definitions.
Update AtomSpacePublisher API documentation with new subscription topics addAF, removeAF. Update all topic message definitions.
Update AtomSpacePublisher API documentation with new subscription topics addAF, removeAF. Update all topic message definitions.
Merge pull request #539 from cosmoharrigan/publisher

Add additional topics to publisher for monitoring AttentionAllocation
Add mising file backtrace-symbols.{h,c}
some of the helper functions and get-instance-name
 helper function choose-var-name and few other corrections
make get-instance-name handle relex2logic output from relx and human inputs
Added InterpretationLink & InterpretationNode to handle the different interpretations of a single parse of a sentence
added PossessionLink & QuantityLink