Add Rails 4 binstubs
Put link_to :confirm option in :data option

Update for Rails 4.0 deprecation. The confirm option is now required to
be nested in a data attribute.
Rails 4.0 config updates
Update to Rails 4.1.6
Use Rails 4.1 secrets.yml
Add rspec binstub
Add minitest to gemfile to stop warning

Was getting the warning:

    Warning: you should require 'minitest/autorun' instead.
    Warning: or add 'gem "minitest"' before 'require "minitest/autorun"'

Adding minitest to the gemfile prevents this.