Chrome sandboxed iframe bugs:

*   Added a demo for Chrome's failure to respect CSP 'self' while
    loading same-source resources within sandboxed iframes.

*   Added a link to the bug tracker and updated the descriptions of
    this bug in the README and presentation.
Minor README and presentation updates.
Renamed *.chrome-sandbox-iframe to be more descriptive.
Added a test case for the Chrome object-in-foreignObject bug.