1. Update skeleton to Bootstrap 3.0.0; 2. Add new html file into views t..

1. Update skeleton to Bootstrap 3.0.0  and update related html's CSS.
2. Update jQuery to 1.10.2
3. Add nav.html, sidebar.html and skeleton.html into app/views directory, to minimize html repetition by including skeleton.html. 
4. Reformat all html to generate neat html source code.