• Added links to OneSignal's setup instructions in OneSignal.h.
• Fix: The idsAvailable callback will now be called with a device push token after the user has accepted notification permissions. This means it can now be called twice (as with the 1.x SDK versions) -- once before the user has granted permission (token will be blank) and once after the user grants push permission (token will not be blank).
• Fix: Not initializing the OneSignal SDK no longer blocks swizzled UIApplicationDelegate methods from getting called.