Added missing bin directory needed with rails 4.

src/bin/bundle

@@ -0,0 +1,3 @@
+#!/usr/bin/env ruby
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
+load Gem.bin_path('bundler', 'bundle')

src/bin/rails

@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+APP_PATH = File.expand_path('../../config/application',  __FILE__)
+require_relative '../config/boot'
+require 'rails/commands'

src/bin/rake

@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+require_relative '../config/boot'
+require 'rake'
+Rake.application.run

src/bin/spring

@@ -0,0 +1,18 @@
+#!/usr/bin/env ruby
+
+# This file loads spring without using Bundler, in order to be fast
+# It gets overwritten when you run the `spring binstub` command
+
+unless defined?(Spring)
+  require "rubygems"
+  require "bundler"
+
+  if match = Bundler.default_lockfile.read.match(/^GEM$.*?^    spring \((.*?)\)$.*?^$/m)
+    ENV["GEM_PATH"] = ([Bundler.bundle_path.to_s] + Gem.path).join(File::PATH_SEPARATOR)
+    ENV["GEM_HOME"] = ""
+    Gem.paths = ENV
+
+    gem "spring", match[1]
+    require "spring/binstub"
+  end
+end