Added GuildUpdate handling, and setting guilds details

src/client/actions/GuildUpdate.js

@@ -0,0 +1,42 @@
+'use strict';
+
+const Action = require('./Action');
+const Constants = require('../../util/Constants');
+const CloneObject = require('../../util/CloneObject');
+const Message = require('../../structures/Message');
+
+class GuildUpdateAction extends Action {
+
+	constructor(client) {
+		super(client);
+		this.deleted = {};
+		this.timeouts = [];
+	}
+
+	handle(data) {
+
+		let client = this.client;
+		let guild = client.store.get('guilds', data.id);
+
+		if (guild) {
+			let oldGuild = CloneObject(guild);
+			guild.setup(data);
+
+			if (!oldGuild.equals(data)) {
+				client.emit(Constants.Events.GUILD_UPDATE, oldGuild, guild);
+			}
+
+			return {
+				old: oldGuild,
+				updated: guild,
+			};
+		}
+
+		return {
+			old: null,
+			updated: null,
+		};
+	}
+};
+
+module.exports = GuildUpdateAction;