updates for hobbs algorithm

@linas 

It can do basic pronoun resolutions correctly right now.
AND conjunctions are now supported, other conjunctions are not supported.

Just started working on https://groups.google.com/forum/#!topic/opencog/gzA3uL26AwM

Some testing results which are marked as "Failed" should be marked as "Passed", I only have corrected some of them.  All the testing results will be updated in the next pull request.



As requested back in pull #899 please change the output here to be (Node "this node is absent if the resolution is OK")  so that its a little more clear about what the above is actually doing.  Because the knee-jerk reaction of other developers will be "WTF" when they see this.

Another design possibility os to call some function that will change the TV on the reference link to be "less confident".