v4.0.3 Bug fixes and improvements

Bugfixes:

• Fixed an issue with UIScrollView where scrollView.isEnabled was set to false but library was still scrolling UIScrollView.

Features:

• Added reloadLayoutIfNeeded to adjust position on the fly.
• UIAccessibility support for next/previous/done buttons.
• Removed manual contentSize adjustment and this should now be calculated by user with their own logic or with Autolayout.
• Added registerTextFieldViewClass, didBeginEditingNotificationName, didEndEditingNotificationName method.

Deprecations and Removed:

• Removed addTextFieldViewDidBeginEditingNotificationName:didEndEditingNotificationName method.