Added untested code to allow LineSentence objects to iterate over file objects as well as over file specified by name. This allows iterating over compressed files.
Added test cases for LineSentence class
Merge pull request #134 from RadixSeven/word2vec_compr

Word2vec compr
remove unused TODO.txt
Merge branch 'develop' of github.com:piskvorky/gensim into develop
Merge branch 'develop' into add_perplexity

Merging upstream changes