Added all_lemma_names() method (contributed by Steven Bethard) to corpus/reader/wordnet,py for  easy access to all lemma names.
Added all_lemma_names() method (contributed by Steven Bethard) to corpus/reader/wordnet,py for  easy access to all lemma names.

svn/trunk@8393

nltk/nltk,nltk/nltk,nltk/nltk