Example update
update website link
example update
Half-parallelism for factor graph building

Remove debug statement.
Print some statistics.
Improve status printing
Add PGPORT and PGHOST for testing and template app
Add lemma and cored to NLP extractor.
Moved NLP extractor to examples.
dcoref as strings for now.
New NLP extractor in spouse example
Protocol buffers for factor graph serialization.
Remove coref.
new sampler
improve protobuf spec
update NLP extractor in spouse example
Remove coref from sentence-level NLP.
update sentences csv in spouse examples
Merge branch 'develop' into protobuf
Improve spec for factor graph serialization.