Klarna helper #tax_rate_for(item) should not divide by zero
Revert "Revert "Merge pull request #1160 from Shopify/pxpay_credential_based_url""

This reverts commit dbba453cb459a9b06471824a41a8579398f64d76.
Always extract query into form_fields
Quick cleanup
Removes #line_item from 2Checkout helper
Update CHANGELOG
Merge pull request #1168 from Shopify/klarna-fix

Klarna helper #tax_rate_for(item) should not divide by zero
Merge pull request #1170 from Shopify/remove-line-items-from-two-checkout-helper

Removes #line_item from 2Checkout helper
Revert "Merge pull request #1150 from Shopify/fix_travisci"

This reverts commit 61f48f643e20eeb207a3ca923109aca47824c181, reversing
changes made to 5811dbef3818d59c33f9eda5cd54138de306ee85.
Merge pull request #1169 from Shopify/pxpay_update

Handle URLs without query params for PxPay
Merge pull request #1172 from Shopify/revert_travis

Revert "Merge pull request #1150 from Shopify/fix_travisci"
Remove trailing whitespace from templates

Closes #1045.
Auth.Net CIM: Fix ordering of order/trans_id

When processing a refund in Auth.net CIM the order fields need to come
before the transId field in order to include the invoice number on the
credit transaction. Without this commit including

  :order => {:invoice_num => 'xxxx'}

on a refund transaction fails.

Closes #1048.
Add PagoFacil gateway

http://www.pagofacil.net/

Closes #1054.
Require ActiveSupport Enumerable extensions

This prevents errors in Rails-less environments.

Closes #1060.