Java Moera library 0.17.1

• Updated Node API.
• Changed string representation of EmojiList.
• Added the list of standard reactions.

Java Moera library 0.17.0

• Updated Node API.

Java Moera library 0.16.6

• Updated Node API.

Java Moera library 0.16.0

A full-fledged Java library to replace moera-commons. The feature set is similar to the existing Python and TypeScript libraries: cryptographic utilities, auto-generated classes for Naming API and Node API, and other utilities. Also added classes for Push Relay API and a simple implementation of JSON-RPC 2.0 client and server to replace the now unsupported jsonrpc4j.