Inlining bootcamp info and setup instructions (to satisfy #290)

1.  Moving general information about bootcamps and setup instruction into `index.html`
    (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.

Closes #290.