content available in apn hash
use underscore convention for symbol, instead of API dash convention
fix incorrect if statemet
Merge pull request #70 from robj/master

content-available support
Add spec to content_available
Small refactoring on content_available
Fix typo
having problems with APN::Notification::DATA_MAX_BYTES, reducing to 255 fixes it. needs more investigation for a pull request
exclude 4.1.0 specifically