[meta] load in configs from pickle

[quinn-dougherty]

Not pickle, but .ini file (along with the function utils.get_config)

[EnvConfig]
num_agents=4
size_i=20
size_j=20
sight_width=5
sight_dist=10
num_crosses=4
[RayConfig]
heterogenous=true
framework=torch
obs_lower_bound=-1.0
obs_upper_bound=1.0
train_batch_size=4000
sgd_minibatch_size=128
num_sgd_iter=3

I'm proposing we add a third categeory ExperimentConfig or something that says what variant on reputation we're using.