add requirements for hub

fix collator test

refactor st and asr collator

more ctc check; valid dataloader with num workers

Add bin for hub（test single wav file）

optimize the log

Update released_model.md

ctc using nn.Dropout; ds2 libri vald batch_size / 4

Optimize the 1xt2x code

fix the run.sh in g2p/zh

Fix bugs of space id in score.cpp and unuse detokenize

fix the ctc.cpp bug

space as <space>

Fix bug of parallel using condition

refactor ds code