Issue with laying out badge before UIBarButtonItem / UIButton has it's frame set (autolayout).

[jhickmanEB]

One nice improvement that could be made to this library, is improving the flow in which the badge view gets built / laid out.

For instance, trying to add a badge to a UIButton that is being built using Autolayout and not having a specific frame set, then the badge is placed on the top left corner of the button by default.

Another example is if you set the badge properties before assigning the UIBarButtonItem to the navigationItem.rightBarButtonItem or navigationItem.rightBarButtonItems properties, the superview is nil.

Would be nice to change the logic of the badge to wait until it's superview (UIBarButtonItem or UIButton) has been fully laid out.