1. ctc alignment
2. refactor data pipeline
3. autolog for deepspeech test
4. refactor checkpoint save/load
5. deepspeech online model
6. mfa alignment example
7. add text normaliztion example
8. TLG for aishell
9. more dataest: thchs30, aidatatang, timit etc.
10. 8k speech example
11. ted en-zh st example
12. more utils