rails s启动时报错：/config/environments/development.rb:1:in `<top (required)>': undefined method `configure' for
http://stackoverflow.com/questions/23258921/rails-generate-rspecinstall-config-environments-development-rb1in-top-requ 的解决方式：
http://stackoverflow.com/questions/23258921/rails-generate-rspecinstall-config-environments-development-rb1in-top-requ 的解决方式：
