fix #75 add sort order for payment method option
fix #81 - hide Payment Option if disabled and amazon session exists
fix #74 - launch amazon checkout login on Payment Option radio button select
fix #80 - improve CSS selector to override custom theme
fix #78 - add 'restrict by ip' developer mode - thanks TinyRocket
Merge branch 'master' of https://github.com/amzn/amazon-payments-magento-plugin