Using coffeescript's fancy ? for nullinity checks as opposed to straight javascript.

[#10317] Write tests for apns node library
Magic question marks.

[#10317] Write tests for apns node library
More magic question marks.

[#10317] Write tests for apns node library
Undoing written boolean check.

[#10317] Write tests for apns node library
Merge pull request #2 from degzhaus/master-10317-write-tests-for-apns-2

Use existential operator in places where it makes sense