Implements smoothscroll

app/views/layouts/_navigation.html.haml

@@ -10,7 +10,7 @@
       = brand
     .collapse.navbar-collapse
       - if content_for :splash_nav
-        %ul.nav.navbar-nav
+        %ul.nav.navbar-nav#splash-nav
           = content_for :splash_nav
       -if user_signed_in?
         %ul.nav.navbar-nav.navbar-right

app/views/layouts/application.html.haml

@@ -15,7 +15,7 @@
         });
       });
     = yield(:head)
-  %body
+  %body{ data: (content_for?(:splash_nav) ? {spy: 'scroll', offset: 0, target: 'splash-nav'} : {} ) }
     = render 'layouts/navigation'
     -# Admin area
     - if controller.class.name.split("::").first=="Admin"