documenting a bit more state variables
documenting a bit more state variables

Summary: adding a bit more documentation about state variables

Differential Revision: D3675779

fbshipit-source-id: 3478479529787edc9aa4c1a25d74a7b0e54b8649

general-ai-challenge/Round1,Intelligent-Machine-Learning/Round1,general-ai-challenge/Round1,Intelligent-Machine-Learning/Round1,general-ai-challenge/Round1,Intelligent-Machine-Learning/Round1