EasyNLP updates 220512

[minghui]

EasyNLP updates 220512

New features:

• Add CLUE benchmark example: https://github.com/alibaba/EasyNLP/tree/master/benchmarks/clue
• CPU training of sequence classification: sequence classification support cpu tranning #59
• BLIP text-image retrieval support: blip text-to-image retrieval support #40
• CLIP text-image retrieval support: openai clip text-to-image retrieval #39

Updates

• fix MetaKD issue: Some question about Meta-KD #80
• fix optimizer amp issue: BUGs about amp #64

[wenmengzhou]

great work