reorganise alignment code, incorporate Thorsten Marek's port of Gale-Church
brought in implementations of IBM Models 1-3
import fixes
fixed min()
code style fixes
fixed gale church implementation so doctests work; used log probabilities instead of raw probabilities for the distance function to improve accuracy
Merge pull request #562 from jskda/align

Fixes to the align branch
Merge branch 'develop' into align
merged multilang-wordnet related changes here: https://gist.github.com/stevenbird/11128654
fixed some bugs
more bug-fixes
fixed bugs in nltk.corpus.util
added the omw corpus to WordNetCorpusReader
field bug fixes
Merge branch 'pull_request.505' of https://github.com/jskda/nltk into align
Merge branch 'develop' of https://github.com/nltk/nltk into develop
Merge branch 'develop' into align
Merge branch 'align' into develop