added the migration generator

generators/navvy/navvy_generator.rb

@@ -0,0 +1,15 @@
+class NavvyGenerator < Rails::Generator::Base
+  def manifest
+    record do |m|
+      options = {
+        :migration_file_name => 'create_jobs'
+      }
+
+      m.migration_template 'migration.rb', 'db/migrate', options
+    end
+  end
+
+  def banner
+    "Usage: #{$0} #{spec.name}"
+  end
+end

generators/navvy/templates/migration.rb

@@ -0,0 +1,20 @@
+class CreateDelayedJobs < ActiveRecord::Migration
+  def self.up
+    create_table :jobs, :force => true do |t|
+      table.string  :object
+      table.string  :method
+      table.text    :arguments
+      table.string  :return
+      table.string  :exception
+      table.time    :created_at
+      table.time    :run_at
+      table.time    :started_at
+      table.time    :completed_at
+      table.time    :failed_at
+    end
+  end
+
+  def self.down
+    drop_table :jobs
+  end
+end

navvy.gemspec

@@ -23,6 +23,8 @@ Gem::Specification.new do |s|
      "README.textile",
      "Rakefile",
      "VERSION",
+     "generators/navvy/navvy_generator.rb",
+     "generators/navvy/templates/migration.rb",
      "lib/navvy.rb",
      "lib/navvy/job/active_record.rb",
      "lib/navvy/job/mongo_mapper.rb",