Add Spring and spring-aware binstubs

Also remove /script, which is no longer used in Rails 4

script/cucumber

@@ -1,10 +0,0 @@
-#!/usr/bin/env ruby
-
-vendored_cucumber_bin = Dir["#{File.dirname(__FILE__)}/../vendor/{gems,plugins}/cucumber*/bin/cucumber"].first
-if vendored_cucumber_bin
-  load File.expand_path(vendored_cucumber_bin)
-else
-  require 'rubygems' unless ENV['NO_RUBYGEMS']
-  require 'cucumber'
-  load Cucumber::BINARY
-end

script/rails

@@ -1,6 +0,0 @@
-#!/usr/bin/env ruby
-# This command will automatically be run when you run "rails" with Rails 3 gems installed from the root of your application.
-
-APP_PATH = File.expand_path('../../config/application',  __FILE__)
-require File.expand_path('../../config/boot',  __FILE__)
-require 'rails/commands'