instance method add_options!

# File railties/lib/rails_generator/generators/components/model/model_generator.rb, line 35
    def add_options!(opt)
      opt.separator ''
      opt.separator 'Options:'
      opt.on("--skip-timestamps",
             "Don't add timestamps to the migration file for this model") { |v| options[:skip_timestamps] = v }
      opt.on("--skip-migration", 
             "Don't generate a migration file for this model") { |v| options[:skip_migration] = v }
      opt.on("--skip-fixture",
             "Don't generation a fixture file for this model") { |v| options[:skip_fixture] = v}
    end