Authorize.Net: Switch to the XML API

This allows the same account to handle both CNP and CP transactions.

Closes #1297.
psigate: Force SSL to SSLv3
Revert "Authorize.Net: Switch to the XML API"

This reverts commit a6cfae5e77ed249de84dbe46a4a91e3a0903a11d.
Default :state to n/a for NetworkMerchants
Merge pull request #1363 from Shopify/fix-nmi-when-no-state

Default :state to n/a for NetworkMerchants
Merge pull request #1362 from Shopify/revert_authorize_net_xml_api

Revert "Authorize.Net: Switch to the XML API"
Merge pull request #1361 from Shopify/force_sslv3_psigate

psigate: Force SSL to SSLv3
Bump version to 1.44.1
Merge pull request #1364 from Shopify/version_bump

Bump version to 1.44.1
HPS: Always pass CardHolderData element

Closes #1298.
Fix comparing a country to a non-country object
Pull the country tests over from active_utils

Add a test for country comparisons

Closes #1331.
PayJunction: Include 'track' parameter if provided

Closes #1337.
WebPay: Fix API calls

Closes #1338
Moneris US: Add store, unstore, and update
Moneris US: Add CVV and AVS

Closes #1347.
Elavon: Fix non-string response keys

Closes #1358.
Cybersource: Fix subscription amount

Closes #1359.
Stripe: Add support for statement_description

https://stripe.com/docs/api#create_charge

Closes #1365.
CASHNet: Add support for fname and lname

Closes #1366.