README.md in delivery_boy-0.2.8.beta1 vs README.md in delivery_boy-0.2.8

@@ -57,12 +57,39 @@
 end
 ```
 
 In addition to improving response time, delivering messages asynchronously also protects your application against Kafka availability issues -- if messages cannot be delivered, they'll be buffered for later and retried automatically.
 
-Both `deliver` and `deliver_async` take the following options:
+A third method is to produce messages first (without delivering the messages to Kafka yet), and deliver them synchronously later.
 
+```ruby
+ # app/controllers/comments_controller.rb
+ class CommentsController < ApplicationController
+   def create
+     @comment = Comment.create!(params)
+     
+     event = {
+       name: "comment_created",
+       data: {
+         comment_id: @comment.id
+         user_id: current_user.id
+       }
+     }
+     
+     # This will queue the two messages in the internal buffer.
+     DeliveryBoy.produce(comment.to_json, topic: "comments")
+     DeliveryBoy.produce(event.to_json, topic: "activity")
+     
+     # This will deliver all messages in the buffer to Kafka.
+     # This call is blocking. 
+     DeliveryBoy.deliver_messages
+   end
+ end
+```
+
+The methods `deliver`, `deliver_async` and `produce` take the following options:
+
 * `topic` – the Kafka topic that should be written to (required).
 * `key` – the key that should be set on the Kafka message (optional).
 * `partition` – a specific partition number that should be written to (optional).
 * `partition_key` – a string that can be used to deterministically select the partition that should be written to (optional).
 
@@ -101,10 +128,14 @@
 
 ##### `client_id`
 
 This is how the client will identify itself to the Kafka brokers. Default is `delivery_boy`.
 
+##### `log_level`
+
+The log level for the logger.
+
 #### Message delivery
 
 ##### `delivery_interval`
 
 The number of seconds between background message deliveries. Default is 10 seconds. Disable timer-based background deliveries by setting this to 0.
@@ -229,20 +260,20 @@
 ```ruby
 describe PostsController do
   describe "#show" do
     it "emits an event to Kafka" do
       post = Post.create!(body: "hello")
-      
+
       get :show, id: post.id
-      
+
       # Use this API to extract all messages written to a Kafka topic.
       messages = DeliveryBoy.testing.messages_for("post_views")
-      
+
       expect(messages.count).to eq 1
-      
+
       # In addition to #value, you can also pull out #key and #partition_key.
       event = JSON.parse(messages.first.value)
-      
+
       expect(event["post_id"]).to eq post.id
     end
   end
 end
 ```