Version 0.7.3
PR #454
PR #451
- Moving UCBVI to rlberry_scool
PR #438
- move long tests to rlberry research
PR #436 #444 #445 #447 #448 #455 #456
- Update user guide
- add tests on the userguide examples
- removing rlberry_research references as much as possible (doc and code)
