* add tutorials

* yapf

* yapf

* copyright

* yapf

* update tutorial lesson5

* delete drawing code

* yapf

* remove action_mapping

* update dqn and add README

* update

* update

* yapf

* remove version 1.3 warnings

* update

* yapf

* add algorithms test

* Update algs_test.py

* Update algs_test.py

add SAC DDPG TD3 tests

* yapf

* remove previous algorithms; use the forward function in parl.Model

* remove abundant lines

* yapf

* intra-version: move parl.framework into parl.core.fluid

* add folder: parl.core

* remove former test folders

* yapf

* yapf0.24