WP80, Android getIds, and Unity 4.6 fixes.

* Fixed build error for all platforms when using Unity 4.6
* Fixed namespace/class errors with WP80.
* Fixed Android bug where idsAvailable could fire with a userId of null if the device is having intermittent connection issues.

Author: jkasten2

UnityOneSignalExample/Assets/Plugins/Android/OneSignal/libs/OneSignalSDK.jar

@@ -175,7 +175,7 @@ public static void DeleteTags(IList<string> keys) {
 	// Call when the player has made an IAP purchase in your game so you can later send push notifications based on free or paid users.
 	public static void SendPurchase(double amount) {
 		#if UNITY_WP8 && !UNITY_EDITOR
-			((OneSignalWP)oneSignalPlatform).SendPurchase(amount);
+			((OneSignalWP80)oneSignalPlatform).SendPurchase(amount);
 		#endif
 	}