[Bug fixes ]fix wget

[bugfix] fix wget for install

[decoder] scorer interface and beam search

[doc]fix img link; rsl format;

[install]setup.py install

revise the path of benchmark after merge the parakeet, add the condition of using kaldi in aishell s1

[BUGFIX]  tokenids ---> _tokenids

[asr]trainer eval when not train

[TTS] merge parakeet repo into deepspeech

u2 kaldi mutli process test with batchsize one

update librispeech conformer result

update librispeech conformer transformer config

fix the bug of doc in benchmark

Add the readthedoc

Revert the ctc loss to 2.1.2 and fix the bug of export model

fix the bug of import ctc decoder