support use type 'link' in section.children and make currentPage more flexible

[zack24q]

we can use type 'link' in the lever 2, like this: { id: 'lever1', name: 'lever1', type: 'heading', children: [ { id: 'lever11', name: 'lever11', state: 'main.page11', type: 'link' }, { id: 'lever12', name: 'lever12', type: 'toggle', pages: [ { id: 'lever121', name: 'lever121', state: 'main.page121' }, { id: 'lever122', name: 'lever122', state: 'main.page122' } ] } ] }

[zack24q]

I think it is more flexible, for example i can get the name from currentPage and display it in page.$scope.title = ssSideNav.currentSection.name;

[sovanna]

nice, thx ;)