hexorx/countries — pull request #185 by bolshakov (2014-10-08 08:50:10+00:00)
Title: Add conversion method ISO3166::Country()

Implement ruby's [conversion idiom](http://www.ruby-doc.org/core-2.1.3/Kernel.html) for ISO3166::Country class, so:

```ruby
country = ISO3166::Country.search('US')

ISO3166::Country(country) #=> #

ISO3166::Country('us') #=> #

ISO3166::Country(42) #=> raises TypeError, "can't convert Fixnum into ISO3166::Country"
```