* Add M3d-RPN model.
Co-authored-by: Nyexiaoqing <yexiaoqing@baidu.com>

test=develop

`dropout `中， `updeconv` 未被更新

* fix init

* update

* fix cgan

* Add SiamRPN and SiamMask
* delete useless code
* fix bug

* fix init

* update

* update docs

* add video tag to video
* add content to reademe
* modify link of models
* refine result format in readme
* refine readme
* add Installation to readme

* fix init

* update

* fix mistake

* fix init

* update

* update_1.8

* update paddle.reader

* update data

* test=develop update one_hot usage according to 1.8

* test=develop update dataloader api by 1.8

* test=develop fix image shape

* test=develop update save load fluid.data

* take fluid.layers.data in place of fluid.data
* delete create_var_list_v2 func
* fix usage bug of fluid.data

* take fluid.layers.data in place of fluid.data
* delete create_var_list_v2 func

* API update of video model
* update api and refine bmn dygraph implementation
* refine Readme and config of bmn dygraph
* fix reademe and reader
* fix details

* fix init

* update

* update_1.8

* update paddle.reader

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

* Add document for DALI installation

* test=develop update one_hot usage according to 1.8

* test=develop update dataloader api by 1.8

* test=develop fix image shape

* fix init

* update

* fix

* add new cls link
* fix content
* fix cv readme
* fix moodels readme

* fix init

* update

* add fid_score for gan

* update readme

* fix models because the gradient clip strategy has been upgraded,test=develop

* fix models because the gradient clip strategy has been upgraded,test=develop

* fix ocr pretrain_model problem

* fix ocr pretrain_model problem

* update readme for paddlecv

* update readme for models

* update readme for models

* add links for plsc paddlslim

* update readme for paddlecv

* update readme for models

* update readme for models

* update image segmentation document
* Update README.md
* update image segmentation docs