Move plugins to separate directory.

plugins/messages/db/migrate/20090120184410_create_messages.rb.skip

@@ -0,0 +1,24 @@
+# This migration has a ".skip" suffix to prevent it from being recognised as
+# a migration. While this migration is relevant for the messages plugin, it
+# was already included in stock foodsoft when messages were part of its core.
+# `rake db:install:migrations` would install this migration, resulting in an
+# attempt to create an already existing messages table.
+#
+# extracted from 20090120184410_road_to_version_three.rb
+class CreateMessages < ActiveRecord::Migration
+  def self.up
+    create_table :messages do |t|
+      t.references :sender
+      t.text :recipients_ids
+      t.string :subject, :null => false
+      t.text :body
+      t.integer :email_state, :default => 0, :null => false
+      t.boolean :private, :default => false
+      t.datetime :created_at
+    end
+  end
+
+  def self.down
+    drop_table :messages
+  end
+end