Files and Functions: Platform Identification

The routines that handle platform identification, like isIOS(), have been moved from API.js into PlatformIdentification.js.

These routines are now evaluated only once at application start-up, which gives the application an overall performance boost.

The routines retain the legacy API version, in the global namespace, along with the new API version in the "hwc" namespace. Even though SAP recommends a scoped routine like hwc.isIOS(), the global routine isIOS() is still available.