`discordban` command + related tags (#50)
* Add `discordban` command + related tags.
Tags added: '<DiscordGroupTag.banned_members>' & '<DiscordUserTag.is_banned[<group>]>'.
* Add `<entry[saveName].user>` + meta fixes.
* Fix maximum arguments number.
* Set syntax to be correct and re-fix max args.
* Remove unused import.
* Various fixes + cleanup
(
commit: 7a75888)
