added PayPal analytics and generated dist/ file

Added FPTI object and methods to send button usage data to PayPal anaytics platform. fpti.init() add handlers  to page load and button form submit events. The handlers trigger beacons which sends button data
I'm thinking this line would explode because `window.performance` could be undefined in non-supported browsers.
[http://caniuse.com/#feat=nav-timing](http://caniuse.com/#feat=nav-timing)