v1.0.0

GumbelSoftmax v1.0.0

• Added implementation of Rao-Blackwellization of Gumbel-Softmax (https://arxiv.org/abs/2010.04838)
• Added example of discrete VAE.
• Reworked API.

Diff since v0.4.0

Merged pull requests:

• v1.0 (#5) (@arnauqb)