adds BinaryStateful trait
bases Disableable on the BinaryStateful trait
adds Disableable trait to Page
version bump
changes terminology of BinaryStateful
restores Disableable.forceEnable()
fixes state name filtering in Disableable state related callbacks
fixes documentation re. Disableable trait requirements
adds utils tests to build
adds basic BinaryStateful unit tests
adds TODOs to BinaryStateful