What's the difference between `master` and `mk3`?

master is the currently stable version, but is in maintenance only mode. It should be fairly reliable.

mk3 is a total rewrite to fix the design and implementation issues of master. It uses the most up to date Discord APIs (v9), however it still has several architectural issues being worked on (rare deadlocks) and the commands will be completely redesigned (currently a pain to use). It is functional, but not very pleasant to use yet.