Several fixes and improvements to the CME disclosure JavaScript.
Improvements to thee front matter display JS:

 * add wrapping container
 * add media query support for responsive layouts
 * use a hidden class instead of manually setting dispaly: none;
Style for hidden elements.
Fix reference to Dom.
Remove window resize handler after display is closed.
Use default button.
Remove excess whitespace.
Merge pull request #18 from gauthierm/cme-disclosure-js-fixes

Several fixes and improvements to the CME disclosure JavaScript.
Fix method call name.
Fix typo (SwatBD vs SwatDB).
Fix method call name,
Only save attestation on HTTP POST method.

Prevents prefetching from having an effect.