Convert to use mysql
Clean up database structure to be more useful for MySQL
- Add cross-server notification (using BungeeCord Message channel)
- Add ability to read any mail by ID (perm: SimpleMail.spy)
- Anyone can read their own outbox mail (via /readmail <id>)
- Make dates a little more readable
- Clean up A LOT of bad code
- Made some of the SQL more efficient (like the purge!)
- Fix several issues where ResultSet was not initialised before use
Improve/cleanup player join notification