Complete rewrite

Changes storage to SQLite or MySQL - which should fix #2 's issue of social spy settings not persisting
There is now an option in the config named console-has-social-spy: true which allows console to have the same formatted readout that people with socialspy do
Options for messaging hidden-players (vanished) and console, as well as config options for what to use as the name for console.
Formatting for how names appear in direct messages and social spy are in the config, other messages can be updated in the Locale
The server can now message itself, if you wanted to do that for some reason
Adds 4 commands
- /block <user> [reason]
- /unblock <user>
- /blocklist
- /msgtoggle
Changes permissions

Permission	What it do
`message.reload`	Allows reloading the config/locale
`message.basic.send`	Allows sending messages
`message.basic.receive`	Allows receiving messages
`message.basic.toggle`	Allows toggling direct messages on or off
`message.basic.block`	Allows blocking, unblocking, and listing your blocked users
`message.admin.override`	Allows messaging users who have their messages disabled, have you blocked, or do not have the receive permission
`message.admin.social-spy`	Shows a log of direct messages being sent between players
`message.admin.console-spy`	Shows a log of any direct messages being sent between the console and players (from this plugin)

SimplePMs