Aleph-vrf

First official release.

Verifiable Random Functions (VRF) are cryptographic primitives that generate random numbers that are both unpredictable and verifiable.
This allows to create "trustless randomness", i.e. generate (pseudo-) random numbers in decentralized systems and provide the assurance that the number was indeed generated randomly.

See the documentation for more details.

This release contains the first iteration of the aleph.im VRF coordinator and executor VMs. See the documentation for more details.

**Full Changelog**: https://github.com/aleph-im/aleph-vrf/commits/v.1.0.0-rc1