changed TARGET to send to EVERYONE

Noticed when sending from a device that the TARGET was set to CHANNELS and the notification was never received on the device. When sending from parse.com website the TARGET was set to EVERYONE. I edited this file based on this post I found on parse.com https://parse.com/questions/how-can-i-send-push-notifications-using-aspnet-or-php that corrects the issue and sets the TARGET to EVERYONE.