Adjustable-Parameter RPS Agent

[aturfah]

Add an RPS agent with adjustable parameters.

More thought needs to go into how exactly to do this, but its the precursor to parametrizing the Pokemon Agents.

[aturfah]

"Parametrization" 1

• Player begins with a set vector of probabilities
• Method 1a
  • For each turn in the game, add weight to corresponding move
  • Ex: Opponent plays Paper, add weight to P(scissors)
  • At the end of battle, reset to original vector
• Method 1b
  • For each turn in the game, add weight to corresponding move
  • Do NOT reset at the battle, gives illusion of 'learning' to the metagame.

Updating title because its already 'parametrized', we're going with 'dynamic parametrization'

[aturfah]

Method 1b is stupid, might add it later but its not an "interesting" opponent to play.

Addressed in #118