Fix comment typo
Add Fisher's exact test
do multi-word windows in the style of Church and Hanks (1990)
oops
Possible fix for the lowest_common_hypernyms

Currently lowest common hypernyms do not return a result based on the
hypernym paths of the 2 synsets. So there may be a "better" result when
taking into account the hypernym paths.
Address some of jnothman's comments
Fix comment
Fix detect_encoding regex in corpus.reader.xmldocs.XMLCorpusView
[nltk/tokenize/punkt.py] typo: taret -> target
Consolidate changes into single function

Based on suggestions from Tschier to use max_depth() function
Merge pull request #420 from Siddhant/patch-1

[nltk/tokenize/punkt.py] fix typo: taret -> target
Updated the docstring
In lch_similarity, added checking of depth to avoid ZeroDivisionError
Merge pull request #417 from wroberts/xmlcorpusview_detect_encoding

Fix detect_encoding regex in corpus.reader.xmldocs.XMLCorpusView
nltk.corpus.reader.wordnet._lcs_by_depth is removed. See #422.
Merge pull request #423 from kmike/remove_lcs_by_depth

remove nltk.corpus.reader.wordnet._lcs_by_depth
Merge pull request #415 from dougalg/master

Proposed resolution for issue 395
Merge pull request #421 from michelleful/master

Added checking for zero depth in lch_similarity
Merge pull request #414 from rmalouf/colloc2

Small improvements to the collocation finders