Add full guild emoji functionality (#749)

* all the emoji stuff

* fix things for hydra 😘

* feck i need to stop committing on github

* update docs again

* Butts

src/client/websocket/packets/handlers/GuildEmojiUpdate.js

@@ -0,0 +1,13 @@
+const AbstractHandler = require('./AbstractHandler');
+
+class GuildEmojiUpdate extends AbstractHandler {
+  handle(packet) {
+    const client = this.packetManager.client;
+    const data = packet.d;
+    const guild = client.guilds.get(data.guild_id);
+    if (!guild) return;
+    client.actions.EmojiUpdate.handle(data, guild);
+  }
+}
+
+module.exports = GuildEmojiUpdate;