Add preprocessor for generating Chinese poetry.

remove useless html.

Fix ci

fix data reader error of text classification.

fix typo

fix a bug of NER that emission feature uses an unexpected nonlinear activation.

Update doc of conv_seq2seq

Add link for new repo.

fix the typo.

delete the redundant directory.

Add the conv_seq_to_seq model (first version).

update README.

shorten the titles.

refine documentation of NCE.