Clean up reactions, add remove all reactions (#890)

* Clean up reactions, add remove all reactions

* Reorganize reactions

* Re-add Gawdl3y's precious little inline

* Update Message.js

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

@@ -0,0 +1,11 @@
+const AbstractHandler = require('./AbstractHandler');
+
+class MessageReactionRemoveAll extends AbstractHandler {
+  handle(packet) {
+    const client = this.packetManager.client;
+    const data = packet.d;
+    client.actions.MessageReactionRemoveAll.handle(data);
+  }
+}
+
+module.exports = MessageReactionRemoveAll;