 - Reworked the Wu-Palmer metric in an attempt to get it to consistently agree with Perdersen's; as yet no success.  - Added lcs() method (finds the lowest common subsumer, or most specific ancestor common to the two supplied synsets).  - Added shortest_path_distance() method to the Synset class. This method is now used by all three currently implemented similarity metrics.
 - Reworked the Wu-Palmer metric in an attempt to get it to consistently agree with Perdersen's; as yet no success.
 - Added lcs() method (finds the lowest common subsumer, or most specific ancestor common to the two supplied synsets).
 - Added shortest_path_distance() method to the Synset class. This method is now used by all three currently implemented similarity metrics.

svn/trunk@3743

nltk/nltk,nltk/nltk,nltk/nltk