Litle: Remove dependency on the Litle gem

Closes #1094.
Litle: Fix case of missing address parts

Litle doesn't like it if you specify an empty country for example.

Closes #1101.
Update CHANGELOG
Merge pull request #1103 from Shopify/update_changelog

Update CHANGELOG
Add currencies to Iridium
Merge pull request #1102 from Shopify/iridium_currencies

Add currencies to Iridium
Bump version; Update CHANGELOG
Merge pull request #1104 from Shopify/release_1428

Release v1.42.8
Spreedly: Add support for more optional fields

Specifically ip, description and gateway_specific_fields.

Closes #1097.
Add american express to supported cards in Pin Gateway
Merge pull request #1113 from pinpayments/add-supported-cardtypes-to-pin-gateway

Add american express to supported cards in Pin Gateway
Specify rails 4 so it does not include rails 4.1 in Gemfile_rails40.
Sage (US): Support store/unstore of cards

Closes #1115.
Merge pull request #1117 from Shopify/fix_rails4_tests

Specify rails 4 so it does not include rails 4.1 in Gemfile_rails40.
Fix AVS/CVV response code handling
Relax matching; Update random
Update CHANGELOG
Merge pull request #1119 from Shopify/fix_raven_avscvv

Update Raven CVV/AVS handling
Bump version
Merge pull request #1121 from Shopify/release1429

Release v1.42.9