release version 1.1.1 (PaddlePaddle#111)

* release version 1.1.1

* add version requirement of tensorboard

release v1.1 (PaddlePaddle#69)

Refine documents of PARL (PaddlePaddle#43)

* remove not used files, add benchmark for DQN and DDPG, add Parameters management Readme

* Update README.md

* Update README.md

* add parl dependence in examples, use np shuffle instead of sklean

* fix codestyle

* refine readme of nips example

* fix bug

* fix code style

* Update README.md

* Update README.md

* Update README.md

* refine document and remove outdated design doc

* Update README.md

* Update README.md

* refine comment

* release version 1.0

* gif of examples

* Update README.md

* update Readme