modified:   hunvec/layers/hs.py
some channels are temporarily removed, slows down training
modified:   hunvec/utils/binary_tree.py
create int8 right away
modified:   hunvec/corpus/corpus.py
- bugfix around c: don't start with next epoch, train/test/valid sets
  are mixed
- creating numpy array right away is much faster
modified:   hunvec/nnlm/nnlm.py
doing monitoring on every 10th batch only: monitoring is quite slow