Experiments based on papers https://arxiv.org/abs/1811.11357, https://arxiv.org/abs/2003.06060.

Implemented:

1. Version of i SIR and correlated i SIR in simple setting
2. Toy experiments on Gaussians
3. Correlated AI SIR
4. Different ULA and MALA samplers
5. Experiments on MCMC GAN stuff