result with specaug

fix clip conf

add stream conf

fix mask for bool type; fix other

replace list zip by stack

add crf layer

add test notebook

remove useless doc

add libri ds2 exp result

eigen doc

g2p example update: add code to ignore sandhi

2. add docstring for some functions.

downgrad python env version

fix ds2 default config

* remove sequnce_mask

* format

* fix ds2 export audio shape from B,D,T to B,T,D

* down and parse cedict

* remove useless

* using third party python pinyin

* jieba as default wordseg

* remove useless

* remove pinyin dict

* using jieba.lcut

* remove doc of cedict egs

* add fan2jian test

* add description for say_digit