**Note**: This is a prototype.

Instead of "In" and "Out" use arrow to mark the input and output
of IPython lessons.

To construct the arrows we only use CSS.

    (instead of using %include directives).
2.  Deleting unused include files containing general bootcamp information.
3.  Leaving the setup instruction snippets in place for now.
4.  Modifying CSS to format things more cleanly now that they're inlined.

When using large font it will overflow the width so I add
max-width in the css.

The 'box' class overflow the window width for some screen size.
This patch fix it using CSS media query.