Theme update and new demo backend

Our new default theme has been added, enjoy! Also the demo backend the app is using has been changed to a new one available in github https://github.com/PaymentHighway/paymenthighway-merchant-backend-demo

Major upgrade: 2.0 release of the Payment Highway iOS SDK

A whole new API for easier, more refined, more customizable integration to your app!

Highlights:

• new, more comprehensive documentation http://paymenthighway.github.io/paymenthighway-ios-framework/
• new demo application https://github.com/PaymentHighway/paymenthighway-ios-framework/tree/master/PaymentHighwayDemo
• customize how the dialog is displayed https://github.com/PaymentHighway/paymenthighway-ios-framework/tree/master/PaymentHighwayDemo#presenter
• customize the theme https://github.com/PaymentHighway/paymenthighway-ios-framework/tree/master/PaymentHighwayDemo#how-customize-appearence-of-the-payment-highway-ui-elements

Payment Highway Sandbox

Modified to use Payment Highway Sandbox as default

Added support for swift 2.2 and dependencies.

Supports new library versions using newer version of swift.

Initial release

v-1.0

Clutch: Initial public release.