Push Notifications for Pusher

• payload: {"aps":{"alert":{"loc-key":"Hey there! Look at awesome Pics!"},"badge":1,"sound":"default", "category": "Actionable"}}
• payload: {"aps":{"alert":{"loc-key":"Welcome to GreatPics!"},"badge":1,"sound":"default"}}
• payload: {"aps":{"alert":{"loc-key":"Wanna random GreatPic?"},"badge":1,"sound":"default"}}
• payload: {"aps":{"content-available":1}}