* liftsim a2c baseline

* update readme

* compatible with different os

* empty

* refine comments

* remove unnecessary assertion; add tensorboard guide

* remove unnecessary assertion

* update parl dependence of A2C

* add new_alg.rst

* rename LiftSim_demo as LiftSim_baseline

* Update new_alg.rst

* Update new_alg.rst

* add liftsim baseline

* yapf

* yapf...

* modify acc. comments

* yapf

* yapf..........

* yapf!

why is yapf on paddle different from that on my mac!!!!!

* 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

* add QuickStart example, refine DQN example

* add examples link

* refine the naming, and add quick start training result

* add logger module

* refine comment

* add license

* refine set_level api

* refine unittest

* fix codestyle with yapf

* add termcolor dependency

* fix wrapper of dynamic_lstm cannot support h_0 and c_0 initialization, fix bug of wrapper of dynamic_gru

* use sampling_id of fluid to sampling ids

* remove test simple games unittest, avoid timeout

* change pip source