Added migrations support and an initial migration.

db/migrate/articles.rb

@@ -0,0 +1,13 @@
+migration 1, :create_articles do
+  up do
+    create_table :articles do
+      column :id, Integer, :serial => true, :nullable? => false
+      column :title, String
+      column :body, "TEXT"
+    end
+  end
+
+  down do
+    drop_table :articles
+  end
+end

lib/tasks/migrations.rake

@@ -0,0 +1,8 @@
+namespace :dm do
+  task :migrate => :environment do
+    gem "dm-migrations", "=0.9.6"
+    require "migration_runner"
+    Dir[File.join(Rails.root, "db", "migrate", "*")].each {|f| require f}
+    migrate_up!
+  end
+end