Add license to gemspec, is MIT
adds codes for curacao and kosovo
Merge pull request #25 from Shopify/feature/add_kosovo_and_curacao

adds codes for curacao and kosovo
version bump for new countries
Merge pull request #26 from Shopify/version/minor_bump_for_new_countries

version bump for new countries
Wrap Zlib::BufError in ActiveMerchant::InvalidResponseError
Merge pull request #27 from Shopify/invalid-response-error

Wrap Zlib::BufError in ActiveMerchant::InvalidResponseError
Bump version to 2.0.2 for new InvalidResponseError
Merge pull request #28 from Shopify/bump-version-to-2.0.2-for-new-invalid-response-error

Bump version to 2.0.2 for new InvalidResponseError
Add OpenSSL::SSL::SSLError as a connection error class
Merge pull request #29 from Shopify/handle_ssl_errors

Add OpenSSL::SSL::SSLError as a connection error class
Add CurrencyCode helper for standardizing currencies to ISO.
CurrencyCode helper shouldn't be case sensitive.
Bump for release v2.1.0
Add SocketError as a connection error class
Minor style refactor.
Merge pull request #30 from Shopify/iso-currencies

Helper for standardizing ISO currencies
Raise InvalidCurrencyCodeError instead of NoMethodError for nil currencies.
Merge pull request #23 from bf4/add-license-to-gemspec

[#22] Add license to gemspec, is MIT
Merge pull request #32 from Shopify/iso-currencies

Raise InvalidCurrencyCodeError instead of NoMethodError for nil currencies