README.md in keynote-0.3.1 vs README.md in keynote-1.0.0

@@ -27,11 +27,11 @@
   def display_name
     "#{user.first_name} #{user.last_name}"
   end
 
   def profile_link
-    link_to user, display_name, data: {user_id: user.id}
+    link_to user, display_name, data: { user_id: user.id }
   end
 end
 ```
 
 You can then instantiate it by calling the `present` method (aliased to `k`) in
@@ -60,12 +60,12 @@
 library. Rumble gives us a simple block-based syntax for generating HTML
 fragments. Here's a small example:
 
 ``` ruby
 build_html do
-  div :id => :content do
-    h1 'Hello World', :class => :main
+  div id: :content do
+    h1 'Hello World', class: :main
   end
 end
 ```
 
 Becomes:
@@ -145,20 +145,20 @@
 ``` ruby
 # app/presenters/user_presenter.rb
 
 class UserPresenter < Keynote::Presenter
   presents :user
-  delegate :first_name, :last_name, :to => :user
+  delegate :first_name, :last_name, to: :user
 
   def display_name
     "#{first_name} #{last_name}"
   end
 end
 ```
 
 You can also generate prefixed methods like `user_first_name` by passing
-`:prefix => true` to the `delegate` method.
+`prefix: true` to the `delegate` method.
 
 ## Rationale
 
 ### Why use presenters or decorators at all?
 
@@ -223,25 +223,34 @@
 That project uses RSpec, but the generator can also create test files for
 Test::Unit or MiniTest::Rails if applicable.
 
 ## Compatibility
 
-Keynote is supported on Rails 3.1, 3.2, 4.0, 4.1, and 4.2. Keynote presenters
-are testable with Test::Unit, RSpec, and MiniTest::Rails (>= 2.0).
+Keynote is supported on Rails 3.1 through 5.1. Keynote presenters are testable
+with Test::Unit, RSpec, and MiniTest::Rails (>= 2.0).
 
 If you find problems with any of the above integrations, please open an issue.
 
 ## Development
 
-You can run Keynote's tests across all supported versions of Rails as follows:
+This repo uses [Roadshow] to generate a [Docker Compose] file for each
+supported version of Rails (with a compatible version of Ruby for each one).
 
-``` bash
-$ bundle install
-$ bundle exec appraisal install
-$ bundle exec rake appraisal
+To run specs across all versions, you can either [get the Roadshow tool] and
+run `roadshow run`, or use Docker Compose directly:
+
 ```
+$ for fn in scenarios/*.docker-compose-yml; do docker-compose -f $fn run --rm scenario; done
+```
 
+To update the set of scenarios, edit `scenarios.yml` and run `roadshow
+generate`, although the Gemfiles in the `scenarios` directory need to be
+maintained manually.
+
 Feel free to submit pull requests according to the usual conventions for Ruby
 projects.
 
 [DisplayCase]: https://github.com/objects-on-rails/display-case
 [Draper]: https://github.com/drapergem/draper
+[Roadshow]: https://github.com/rf-/roadshow
+[Docker Compose]: https://docs.docker.com/compose/
+[get the Roadshow tool]: https://github.com/rf-/roadshow/releases