Remove @property notificationQueue declaration because it is not needed

Signed-off-by: Tom Diggle <tom@tomdiggle.com>
Add a completion handler to call when the notification is dismissed

Signed-off-by: Tom Diggle <tom@tomdiggle.com>
Change only set the progress tint color white in iOS 7 or later

Signed-off-by: Tom Diggle <tom@tomdiggle.com>
bump to version 0.5

Signed-off-by: Tom Diggle <tom@tomdiggle.com>