updated readme

app/controllers/topics_controller.rb

@@ -0,0 +1,34 @@
+class TopicsController < ApplicationController
+  load_and_authorize_resource :forum
+  load_and_authorize_resource :topic, :through => :forum, :shallow => true
+  
+  def show
+    @topic.hit! if @topic
+  end
+  
+  def create
+    @topic.user = current_user
+    
+    if @topic.save
+      flash[:notice] = "Topic was successfully created."
+      redirect_to topic_url(@topic)
+    else
+      render :action => 'new'
+    end
+  end
+  
+  def update
+    if @topic.update_attributes(params[:topic])
+      flash[:notice] = "Topic was updated successfully."
+      redirect_to topic_url(@topic)
+    end
+  end
+
+  def destroy
+    if @topic.destroy
+      flash[:notice] = "Topic was deleted successfully."
+      redirect_to forum_url(@topic.forum)
+    end
+  end
+  
+end