refactor component for test, align

fix_mfa

修改pre_commit, 注释以及增加ds2的seed

fix specaug config

feat (D,T) to (T, D); time warp

support replace with mean by aug

fix the bug of 'import path error' for ds2

support  kaldi data pipeline

Ds2 online

set lr_decay from 0.9 to 0.91

fix spelling mistake

路径修复

speechnn makefile

test w/ all example & fix ctc api & add new io