Exonum Java Binding v0.8.0

This release brings mainly internal fixes and improvements. It is based on Exonum 0.12.

Changed

• Ed25519CryptoFunction to use the system libsodium by default. If libsodium is not installed,
  it will load the bundled library. (#991)
• Ed25519CryptoFunction is made package-private. It remains accessible via
  CryptoFunctions#ed25519.
• After the introduction of MerkleDB the hash of the index is not equal to the root hash of the
  corresponding proof tree anymore. Therefore CheckedProof#getRootHash,
  ProofListIndexProxy#getRootHash and ProofMapIndexProxy#getRootHash are replaced with
  CheckedProof#getIndexHash, ProofListIndexProxy#getIndexHash and
  ProofMapIndexProxy#getIndexHash accordingly.
• Network configuration workflow. generate-config subcommand now accepts a single parameter -
  output directory instead of separate parameters for private and public node configs. See
  Tutorial for updated instructions.

Added

• stream for sets: KeySetIndex and ValueSetIndex. (#1088)
• Proofs of absence of an element with the specified index for ProofListIndexProxy. (#1081)