Add laug and sc-gpt (#201)

Dockerfile

convlab2/laug/README.md

convlab2/laug/Speech_Disfluency/LSTMCRF.py

convlab2/laug/Speech_Disfluency/README.md

convlab2/laug/Speech_Disfluency/Speech_Disfluency.py

convlab2/laug/Speech_Disfluency/__init__.py

convlab2/laug/Speech_Disfluency/inference.py

convlab2/laug/Speech_Disfluency/train.py

convlab2/laug/Speech_Recognition/ASR.py

convlab2/laug/Speech_Recognition/README.md

convlab2/laug/Speech_Recognition/Speech_Recognition.py

convlab2/laug/Speech_Recognition/TTS.py

convlab2/laug/Speech_Recognition/__init__.py

convlab2/laug/Speech_Recognition/multiwoz/detection_utils.py

.../Speech_Recognition/multiwoz/paraphrase_span_detection.py

convlab2/laug/Speech_Recognition/multiwoz/span_detection.py

convlab2/laug/Text_Paraphrasing/README.md

convlab2/laug/Text_Paraphrasing/Text_Paraphrasing.py

convlab2/laug/Text_Paraphrasing/__init__.py

convlab2/laug/Text_Paraphrasing/utils.py