Don't pass WYSIWYG field data through wpautop() if the new 'raw' parameter is set.  Backwards compatible.

Signed-off-by: Gawain Lynch <gawain.lynch@gmail.com>
Add 'raw' parameter to WYSIWYG demo field.  Set to FALSE (default).

Signed-off-by: Gawain Lynch <gawain.lynch@gmail.com>