update versions in gemfile and mention how to use it in a comment
update versions in gemfile and mention how to use it in a comment

chintootech/scala-bootstrapper,twitter/scala-bootstrapper,wuqiangxjtu/scala-bootstrapper,fizx/scala-bootstrapper,chintootech/scala-bootstrapper,fizx/scala-bootstrapper,hydro2k/scala-bootstrapper,wuqiangxjtu/scala-bootstrapper,chintootech/scala-bootstrapper,hydro2k/scala-bootstrapper,hydro2k/scala-bootstrapper,twitter/scala-bootstrapper,wuqiangxjtu/scala-bootstrapper