* Added country calling codes, which may be accessed with the `calling` instance method
* Added `search_by_name`, `search_by_currency` and `search_by_calling_code` methods
* `:fuzzy` option on `find` is deprecated (use the `search_by_name` method instead)
Version bump to 0.4.0
Update history for version 0.4.0
Regenerated gemspec for version 0.4.0