* add distributed training and gpu decoding and pre-processing of video

* Add document for DALI installation

* Rename folder name in PaddleCV
* rename PaddleVideo to video
* rename PaddleGAN to gan
* rename Paddle3D to 3d_vision
* remove PaddleSlim

* Add PaddleDetection/release/0.2 as submodule

* Update link in models/README.md and models/PaddleCV/README.md

This reverts commit 0be3697c.

* fix fluid.data and fluid.io.DataLoader

* add logger in utils/utility.py

* fix reader, metrics, frameworks to increase universality of PaddleVideo

* change config files from .txt to .yaml

* fix input to use PyReader and modify on readme to fit new codes

* adjust code structure and modify configs and readme to fit standard

* modify links of pdparams in readme and scripts

* fix pickle.dump in python3 and modify on readme of attention_lstm

* add description of weights argument in eval/predict/inference_model.py

* add cuda check to show errors when run on paddle compiled with cpu only

* change use_cuda to use_gpu in the error infomation to be consistent with code

* fix test and infer for ctcn

* add instruction to dataset/ctcn/readme

* Shift up fluid models

* Update nlp submodules

* Add redirect guide in org readme

* Move HiNAS_models to AutoDL

* Delete file
* Rever the raw file

* Adjust the structure of whole repo

* Correct the readme for speec

* Update submodules LAC, Senta and SimNet