Merge branch 'master' of https://github.com/jskda/nltk
kludge to handle unknown tags
removed redundant copyright file
make word_tokenize behave across sentence boundaries, by incorporating Punkt
fixed index in FreqDist.max
avoid modifying dictionary during iteration over dictionary
merge stevenbird/fdist
replaced freqdist.inc(x) with freqdist[x] += 1
fix error in previous commit
merging changes from https://github.com/jskda/nltk/commit/7f8a67113909da5fcc7323a2902343e5480ade7d but preserving Nr instead of nr
incorporating more suggestions from https://github.com/nltk/nltk/pull/544
Merge branch 'master' of https://github.com/nltk/nltk into fdist
Merge branch 'fdist' of https://github.com/nltk/nltk into pull_request.nltk.probability.FreqDist

Conflicts:
	nltk/probability.py
	nltk/test/probability.doctest
fixed the bug calling Nr() and bug in max() that was causing the problem described here: https://github.com/nltk/nltk/pull/544