Apply latest code from Kueitso

[jerry871002]

Kueitso sent us the latest code he used to produce the results in the paper, and we should update the code here to match the newest version.

This issue requires careful inspection to make sure we keep everything working.

Tasks

• [x] #1
• [x] #17
• [x] Integrate the baseball environment with run_exp_and_plot.py
• [x] Use scripts/run_exps_and_plot.sh to run the baseball experiments

[jerry871002]

Done 🎉