Split commands into subdirectories

* Move command files into directories

* Edit relative paths

* Update gitignore

* Finish support for commands in subdir

* Split up getCommandFiles into own function

* Add support for subdirs on help command

commands/misc/ping.js

@@ -0,0 +1,7 @@
+module.exports = {
+	name: 'ping',
+	description: 'Just ping.',
+	execute({message, client}) {
+		message.channel.send(`Pong.\n${client.ws.ping}ms`)
+	}
+};