handiz

add new function ptq first then initialize qat scale with ptq scale

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### PR types New features ### PR changes APIs ### Describe instead of save ptq model, then load it before qat, now we can initialize qat scale directly with ptq...

add new condition in 'is_skip_layernorm' function to adapt special structure

快速入门文档遇到问题

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1. [install.md](https://github.com/PaddlePaddle/PaddleVideo/blob/develop/docs/zh-CN/install.mdl) > ppvideo --model_name='ppTSM' --video_file='data/example.mp4' ppvideo包使用命令中data/example.mp4 文件不存在，替换为data/example.avi 可使用 2. [paddlevideo包使用教程](https://github.com/PaddlePaddle/PaddleVideo/blob/develop/docs/zh-CN/whl_zh.md) 快速开始，同样存在example.mp4不存在问题，更换为example.avi，执行 result=clas.predict(video_file)，会报错： ``` File "", line 1, in File "/usr/local/python3.7.0/lib/python3.7/site-packages/ppvideo/tools/paddlevideo_clas.py", line 294, in predict v = utils.decode(video, self.args) AttributeError:...