Saving Re-write

[ParadauxIO]

This is going to be a culmination of a few months worth of effort but essentially what I want to have done is the following:

• Abstract away JDA as much as possible, so I can flip to a different wrapper should I feel like it in the future
• Use redis to aid in the caching of objects such as guilds, to preemptively prepare for sharding support.
• Switch to PostgreSQL as the database engine, dropping MongoDB in its entirety.
• Write a new permission handler which supports per-guild permissions
• Refactor existing managers, general cleanup of bad code.
• Wrap data classes in a POJO which allows for modification without interacting with the DB directly
• Add reaction-role capability.

Button, slash command and thread support, are planned but I haven't decided how I'm going to implement those just yet

Stretch goals:

• Fix website interoperability
• Setup RESTful API to control individual instances
• Web panel allowing users to configure their guild using Discord OAuth