Features:
[+] Added the option to set your own color for "invisible" discord roles.
[+] Added the option to use your server's join and leave messages instead of the ones from the 'language.yml' file.
[+] Added the option to enable death messages.

Fixes:
[-] Fixed the %role_color% placeholder not ignoring "invisible" roles. Now it will return the color which is displayed when a user speaks in chat.
[-] Fixed the discord section of the config not reloading upon running the '/dco reload' command.
[-] Fixed paragraph symbols (§) not being recognised as color code identifiers.
[-] Fixed '&r' sometimes pointing to a hex color. It will now always point to '&f'.
[-] Fixed the order in which events are handled. Discordo will now wait for all other plugins to handle their events before firing its own. This will allow other plugins to change the chat format, join/leave messages and death messages before Discordo uses them.