Update to Latest PK, add AltBeacon support for Android

This update implements the latest Proximity Kit SDKs for iOS and Android.  On iOS this adds analytics support and fixes the bug where the app crashes when trying to relaunch itself when detecting a beacon in the background (after the user terminates the app or reboots the device).  On Android this adds AltBeacon support and fixes the power-save mode and ranging event frequency bugs.  

One edge case that this update doesn't solve is reacting to beacon events with Javascript after the app has been terminated or the device rebooted.  The native code will detect beacons in the background on both platforms in this case, but the cordova app's Javascript is unable to respond to these events since it will only be running if the user launches the app into the foreground (thus loading the apps webview and Javascript).  A couple solutions have been discussed but not implemented yet.