Gemfile's new clothes

The Bundler team currently works hard on pushing Bundler to the 2.0 release. This release will change a lot of default behavior, so it might be good to catch up with these changes way before the actual release. Some of the things that Bundler 2.0 will change are already possible with the latest releases, they’re just not default yet.Probably one of the most visible changes is that Gemfile and Gemfile.lock will cease to exist. Well, under that name, at least. Enter gems.rb and gems.locked.