updated readme

db/migrate/20110808220246_create_posts_table.rb

@@ -0,0 +1,16 @@
+class CreatePostsTable < ActiveRecord::Migration
+  def self.up
+    create_table :posts, :force => true do |t|
+      t.string   :body
+      t.integer  :forum_id
+      t.integer  :topic_id
+      t.integer  :user_id
+
+      t.timestamps
+    end
+  end
+
+  def self.down
+    drop_table :posts
+  end
+end