reverbdev/flexyear — pull request #7 by tmaier (2013-06-23 14:40:36+00:00)
Title: Order years in range

Well, a spec says more than thousand words

```ruby
context "given a range 1975-1973 (from high to low)" do
subject { FlexYear.new('1975-1973') }
its(:year_low) { should eq(1973) }
its(:year_high) { should eq(1975) }
end
```

Based on #1