iOS device identifier alternative 

In the wake of Apple's decision to cut off the use of their device uuid variable, AppBlade adapts.  

Method: Use an AppBladeKeys.plist along side an edited ResourceRules.plist, we embed a device secret on ipa download that will be unique to that device for that installation. AppBladeKeys.plist will contain an endpoint, a project_secret (for determining which Version/Project/ReleaseTrack to hit), and a device_secret (for device/user identification and authorization). 

Device secret is updated periodically if we need to reauthorize.