You can clone with
Clean up Appraisals and Rake
run tests without Appraisal when BUNDLE_GEMFILE is set
bundler/setup is important.
bundler/gem_tasks is easier.
Use Bundler gem conventions.
use appraisal to test against both rails 3.1.0 and 3.0.10
switch to use rspec for tests
final changes based on new test/dummy structure from enginex run