* fix bug of annotation file root

* fix bug of feature file not exists

* fix bmn model implemented with dynamic graph mode

* fix eval.py and README to increase the model usability

* add new model, bmn dygraph model for video temporal proposal generation

* matching new API, decoupling model and  train module

* add BSN and BMN models to PaddleVideo

* modify codes to fix metrics evaluation and readme

* add copyright for gen_infer_list.py and modify the content of README

* add BSN and BMN in models/README.md