brixen/redcard — pull request #4 by robgleeson (2013-10-22 17:52:22+00:00)
Title: yield a block to RedCheck.check() when it evaluates to true.

yield a block to RedCheck.check() when it evaluates to true, so you can say:

```ruby
RedCard.check("1.9") do
puts "I'm on 1.9"
end
```