update with changes from Production branch

db/migrate/20110427021659_add_indices_to_comments.rb

@@ -0,0 +1,9 @@
+class AddIndicesToComments < ActiveRecord::Migration
+  def self.up
+    add_index :comments, :channel_id
+  end
+
+  def self.down
+    remove_index :comments, :channel_id
+  end
+end