Manages state of menus on the layout.

 On branch layout_state_management
	modified:   app/assets/javascripts/backbone/lib/components/layouts/header_sidebars/header_sidebar_app.js.coffee
	new file:   app/assets/javascripts/backbone/lib/components/layouts/header_sidebars/header_sidebar_state_manager.js.coffee
Merge pull request #27 from kalamarico/layout_state_management

Manages state of menus on the layout.