adjust banner copy
raise ValueError if word2vec format invalid (was: assert)
add link to blog tutorial to word2vec docs
save/load automatically detect large arrays & store them separately & mmap back
optimize word2vec initialization (less mem)
don't store normalized word2vec vectors on save/load
make LDA and LSI use the new save/load functionality
new tests targetting large dataset
* meant to catch the various numpy issues on windows 64bit with large arrays
make the new LSI/LDA format backward compatible
add unit tests for the new save/load functionality