Add a user index to the changeset table.

db/migrate/026_add_changeset_user_index.rb

@@ -0,0 +1,9 @@
+class AddChangesetUserIndex < ActiveRecord::Migration
+  def self.up
+    add_index "changesets", ["user_id"], :name => "changesets_user_id_idx"
+  end
+
+  def self.down
+    remove_index "changesets", :name => "changesets_user_id_idx"
+  end
+end