mrorii/hw2-team08 — pull request #20 by htcbug (2012-12-03 06:09:09+00:00)
Title: New DocumentRetrieval Ready

1, Added WordNet-based QueryExpander.
2, Unify all the QueryExpanders with the same init and query expand
interface. They also support init and query expand parameters (so we
can use yaml files to configure these parameters).