Improved the fix for issue #584 even further ;-)
Merge pull request #763 from waywalker/issue-584-scrollview-position

Improved the fix for issue #584 even further ;-)
Added constant POST_APNS_TOKEN_URL

The optional constant will contain the URL to send the APNS device token to, after it has been generated on the device.
Saved the APNS device token and sent it to the app backend server to manage push notifications
Removed unused method
Whoops! postParams required a NSURL, not a NSString
Only post token when POST_APNS_TOKEN_URL is set
Fix compilation error in Standalone mode

Closes #773.
Append app_id and user_id to issue download URLs
Fixed apns token string generation
Manage failed book initialisation for Standalone

When initialisation of a BakerBook fails (e.g. because of a JSON parsing error) the book will be skipped and an error will be returned, instead of having the whole application crash later down the line.
Manage failed book initialisation for Newsstand

When initialisation of a BakerBook fails (e.g. because of a JSON parsing error) the reading operation will be aborted and an error will be displayed, instead of having the whole application crash.
Merge commit 'fa9df76611d660933ca8ab112e03ba23b0fcd10a' into newsstand_notification

Conflicts:
	Baker/AppDelegate.m
	BakerShelf/ShelfViewController.m