AolrSentencePassageRetrieval: Include result title in a debug print
InteractiveAnswerPrinter: New consumer that will print out the answer on stdout
Add support for pipe-based question/answer I/O

Particular phases/blanqa blocks are shown as examples within the class descriptions.
contrib/irssi-brmson-pipe.pl: An irssi-based IRC interface to blanqa
README: Add instructions on how to use Wikipedia as a data source