0.4_distributions_pr

https://github.com/pytorch/pytorch/pull/6666 [distributions] Skip validation of lazy properties
https://github.com/pytorch/pytorch/pull/6615 [distributions] Implement Independent distribution
https://github.com/pytorch/pytorch/pull/6427 Add method to calculate perplexity of distribution
https://github.com/pytorch/pytorch/pull/6172 [distributions] KL-Divergence for Multivariate Normal
https://github.com/pytorch/pytorch/pull/6035 [distributions] Support python floats in AffineTransform
https://github.com/pytorch/pytorch/pull/5989 [distributions] Rename .params to .arg_constraints, fix logic
https://github.com/pytorch/pytorch/pull/5976 [distributions] Implement Power transform
https://github.com/pytorch/pytorch/pull/5931 [distributions] Fix scalar bugs in torch.distributions.transforms etc.
https://github.com/pytorch/pytorch/pull/5910 [distributions] Support pickling of constraint objects
https://github.com/pytorch/pytorch/pull/5842 [distributions] Avoid in-place ops in BoltzmannTransform
https://github.com/pytorch/pytorch/pull/5547 Implementation of the logistic-normal distribution
https://github.com/pytorch/pytorch/pull/5172 Fix sign error in TransformedDistribution.cdf() and .icdf()
https://github.com/pytorch/pytorch/pull/5086 Ensure Distribution.sample() result is detached
https://github.com/pytorch/pytorch/pull/5079 Implementation of the cumulative distribution function and its inverse
https://github.com/pytorch/pytorch/pull/5056 Implemented RelaxedOneHotCategorical + RelaxedBernoulli distributions
https://github.com/pytorch/pytorch/pull/4950 Added an implementation of a multivariate normal distribution
https://github.com/pytorch/pytorch/pull/4937 Support multivariate TransformedDistributions
https://github.com/pytorch/pytorch/pull/4923 Adding mean, variance, stddev to distributions
https://github.com/pytorch/pytorch/pull/4902 Implement constraint registry for torch.distributions
https://github.com/pytorch/pytorch/pull/4849 More distributions fixes for scalars.
https://github.com/pytorch/pytorch/pull/4708 Implement geometric distribution
https://github.com/pytorch/pytorch/pull/4706 Implementation of the Fisher-Snedecor Distribution
https://github.com/pytorch/pytorch/pull/4688 Refactor distributions
https://github.com/pytorch/pytorch/pull/4658 Implement binomial distribution
https://github.com/pytorch/pytorch/pull/4638 Addition of KL-Divergences for torch.distributions
https://github.com/pytorch/pytorch/pull/4624 Implement Multinomial distribution
https://github.com/pytorch/pytorch/pull/4572 Add torch.distributions.utils._finfo for numerical stability
https://github.com/pytorch/pytorch/pull/4556 Implement Poisson distribution, added Distributions.cu, CUDAGenerator
https://github.com/pytorch/pytorch/pull/4525 Start framework for kl_divergence(-,-) in torch.distributions
https://github.com/pytorch/pytorch/pull/4517 Implementation of Gumbel Distribution
https://github.com/pytorch/pytorch/pull/4510 Implement Student's t-distribution
https://github.com/pytorch/pytorch/pull/4459 Implementation of Pareto Distribution
https://github.com/pytorch/pytorch/pull/4450 Declare constraints for distribution parameters and support
https://github.com/pytorch/pytorch/pull/4425 Implement Chi2 distribution
https://github.com/pytorch/pytorch/pull/4357 Implement OneHotCategorical distribution
https://github.com/pytorch/pytorch/pull/4356 Adding the Cauchy distribution to torch.distributions
https://github.com/pytorch/pytorch/pull/4328 Adding Uniform distribution to PyTorch
https://github.com/pytorch/pytorch/pull/4289 Implement Laplace distribution
https://github.com/pytorch/pytorch/pull/4268 Implement .entropy() methods for all distributions
https://github.com/pytorch/pytorch/pull/4234 Implement Exponential distribution
https://github.com/pytorch/pytorch/pull/4210 Allow value broadcasting in distributions.Distribution
https://github.com/pytorch/pytorch/pull/4193 Provide full support for distribution shapes
https://github.com/pytorch/pytorch/pull/4140 Allow for broadcasting of distribution parameters
https://github.com/pytorch/pytorch/pull/4131 Moving distribution classes into a separate package
https://github.com/pytorch/pytorch/pull/4129 Implement .enumerate_support() for Bernoulli, Categorical distributions
https://github.com/pytorch/pytorch/pull/4117 Implement Dirichlet and Beta distributions
https://github.com/pytorch/pytorch/pull/3841 Implement torch.standard_gamma and distributions.Gamma