Development Mode

[zenith-777]

Hi,

I'm using your gem now and experienced some trouble in sending push notification. The problem that it always return 'nil' every time I tried.
Apparently, I'm using development certificate and the APNS.host should be 'gateway.sandbox.push.apple.com'. (See this https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/ProvisioningDevelopment.html)

So, I just want to add suggestion maybe you can add information in the readme or description about APNS host for development mode (gateway.sandbox.push.apple.com) is not the same with production mode (gateway.push.apple.com). There is no big issue at all, it's just that I don't know where I can comment for other user having similar experience with me. Thanks :-)

[NicosKaralis]

Fixed in commit 6fbe894