* Convert code format to python2.7 (SAC)
* Convert code format python2.7 (TD3, all fD)
* Remove no use import and black setting
* Change SAC param
* Change env name Reacher-v2 to v1
* Remove old version reacher training script
* Convert code format python2.7
* Modify .travis.yml
* Add install command python3.6 & black on Makefile
* Fix seperator to tab on Makefile
* Modify Makefile
* Fix little error
* Change td3 gamma parameter
* Format repository
* Clone files from medipixel repo
* Fix DDPGfDAgent.update_model()
* Fix bug on _initialize()
* Add demo-path parameter and demo data
* Rename init_priority to _max_priority for PER
This makes PER and PERfD consistent.
* Make i_episode attribute of DDPGAgent
* Clone SAC code from medipixel repo
* Fix update_model() for SACfD
* Fix _initialize() for SACfD
* Add is_discrete attribute to AbstractAgent for SACfD
* Add i_episode attribute to SACAgent for SACfD
* Modularize DDPGAgent and SACAgent
* Modify hyperparameters for DDPGfD and SACfD
* Add NStepBuffer
* Add n-step to DDPGfD
* Add n-step to SACfD
* Add TD3fD without n-step
* Attempt to tune hyperparameters
* Remove discrete environment check in SAC
* Implement n-step on TD3fD
* Fix step function of TD3
No done check, and _add_transition_to_memory was not called.
* Fix actor loss calculation for TD3fD
* Attempt to tune hyperparameters
* Print both critic losses
* Fix typo bug
* Attempt to tune hyperparameters
* Fix bug in n-step demo retrieval
* Fix bug in n-step transition addition
Donghyeon Kim