0.8.0

Version 0.8.0 (#32)

* Update nodejs versions in Travis configuration (to latest, 6, 5 and 4)

* Fix ResponsiveNavigation resize handler leak (#27)

* Fix ResponsiveNavigation resize event leak

* Use bind instead of class properties

* Add accordion component (#30)

* Add accordion component

* Add missing isActive prop on AccordionContent

* Add tests for isActive prop on AccordionContent

* Add yarn.lock

* Change to use prop-types library

* Fix warning in progress bar test

* Fix linting errors

* Add precommit hook