Private replies for commands

The private replies can be notices too!

Bonus secret feature: "command-reply" formatting entry, which can have
%realSender% to highlight the user who sent the command.
ConsoleListener: check for /me and /say correctly

Split by spaces just like CraftIRCListener does. Before this, commands
such as "/metrics reload" would get interpreted as "/me rics reload".

Also added empty fields such as realSender/prefix/suffix.

This class looks like a bit like it's copypasted from CraftIRCListener
but there are slight differences such as .getCommand()