Fixed a bug in the handling of multiple charges to the same customer
Eway: Update supported countries

Eway is now also available in the UK and New Zealand.
gemspec: Dont force nokogiri lesser than 1.6.0

Nokogiri drop support for Ruby 1.8 with nokogiri 1.6.0.
It fix a lot of bugs with libxml2 and others.

* https://github.com/sparklemotion/nokogiri/commit/7c5f3f6c444b73192abbcc19ef9e3c987cdf7ab0

And force a user to downgrade his nokogiri version is not very friendly to
a project that want to be up-to-date.

ref #765
Firstdata E4: Include missing address information for AVS and CVV results.
Allow changing the primary response of a MultiResponse to the first one run.
Stripe: Make the actual refund response primary rather than the fee refund.
Merge pull request #813 from spk/nokogiri_bump

gemspec: Dont force nokogiri lesser than 1.6.0
Merge pull request #798 from duff/eway_countries

Eway: Update supported countries
Pass the primary response into the run method instead of tacking it on the end.
Merge pull request #779 from demillir/stripe-fix

Fixed a bug in the handling of multiple charges to the same customer
Merge pull request #814 from Shopify/fix-firstdata-avs-result

Firstdata E4: Include missing address information for AVS and CVV results
Litle: Deprecate credit method in favor of refund.
Credit deprecation test for litle.
Moneris: Add verification_value support

We're now actually sending the CVV to Moneris and parsing the CVV result
from the response.

Closes #817.
Merge pull request #816 from Shopify/primary-response

Allow making the first response of a MultiResponse the primary response
SecureNet: Allow some optional fields

Now :invoice_description and :invoice_number can be specified in the
options for a purchase or an authorization and we map :description to
the much larger NOTES field.

http://cl.ly/image/2e360n1g1T21/content.png

Closes #825.
Balanced: Adjust BalancedGateway::Error parent

It's now ActiveMerchant::ActiveMerchantError rather than StandardError.
We want to allow users of ActiveMerchant to generically rescue errors
without having to have special gateway specific handling.

Closes #826.
realex also accepts a varref; so pass that on if it is one of the options
allow refund/rebate password to be passed in as an option to the refund call
add ip and customer vars to refunds also