JellyChats

User-facing changes

• Updated chat registration message
• Added Developers section to README

Internal changes

• Use UUIDs for rank providers
• Switched to a multi-module Gradle project
• Move most code to the platform-agnostic core module
  • Each messenger now uses the MessageAuthor class instead of Velocity's CommandSource
• Added Javadocs for each class in the core module
• Added a JellyChatsPluginProvider class which allows other developers to easily access methods from JellyChats

Full Changelog: https://github.com/azurejelly/jelly-chats/compare/1.1.0...1.2.0