Add CBOW
Add newline at end of word2vec_inner.pyx
'sg' now the last formal parameter of __init__()

Allows people initializing Word2Vec models using positional arguments to
keep the same syntax
Merge pull request #169 from josephcc/develop

Create a dictionary that maps document id to some metadata of the original corpus
Add unit test (for CBOW)
update CHANGELOG
Merge branch 'develop' of github.com:piskvorky/gensim into develop
Merge pull request #176 from sebastien-j/cbow

CBOW
Merge branch 'develop' of github.com:piskvorky/gensim into develop
credit CBOW word2vec + pep8 fixes re. #176
CHANGELOG credit for Joseph's metadata API
Add MalletCorpus format
Merge pull request #179 from cscorley/malletcorpus

Add MalletCorpus format
use smart_open in all corpora (allowing compressed I/O)
add corpus (de)compression changes to CHANGELOG
add python 2.6 to travis CI
add dates to CHANGELOG
simplify banner
minor doc fixes
bump version to 0.9.0