changed due to changed response from server.py
changed support for bilingual concordancer, added support for incremental updatings
changes to logging
added logging; treated, maybe fixed, predict timouts
report empty alignment matrix as error
robustness fixes
rephraser.py: some changes to help debugging
added beam pruning to the decoding function
removed debugging code
the paraphrase table gives raw probabilities, so we need to log those to make them scores that can be added up