Add billing plans so different plans can be compared. Performance enhancements to charge calculations.

rules/lantern-dataaccess-rules/src/main/java/com/lanternsoftware/dataaccess/rules/MongoRulesDataAccess.java

@@ -60,6 +60,7 @@ public class MongoRulesDataAccess implements RulesDataAccess {
 
 	@Override
 	public void putFcmDevice(FcmDevice _device) {
+		proxy.delete(FcmDevice.class, new DaoQuery("account_id", _device.getAccountId()).and("token", _device.getToken()));
 		proxy.save(_device);
 	}