add find_country_by_name method, use downcase in find methods

[joecorcoran]

Hi,

Thanks for this gem, it's really great. Just thought I'd let you know about this change I've made. I thought it was a little weird that the find_by_name method returned an array containing the country code and then a hash with all the country data. Maybe this was needed for a specific case? I would expect it to return a Country instance. Ideally I'd replace the old method, but I've added a separate find_country_by_name method to avoid getting in anyone's way.

I also downcased the search term and country name(s) in find_by_name to allow for user capitalization mistakes, as I'm pulling in location data from APIs. The usage of this method is unaffected.

I had trouble running the tests at first for some reason – I had to resort to specifying the encoding at the top of the file.

Cheers,

Joe

[hexorx]

Thank you for contributing! There was a small bug that was causing the tests to fail but I fixed it and have pushed a new version of the gem.