Twenty Eleven:

 * Use add_option(), rather than get_option() with defaults, to prevent notoption queries.
 * Add twentyeleven_theme_options_validate filter, that way one doesn't need to add a filter to sanitize_option_\$option to allow more options in.
 * Some inline doc modifications and additions.
see #17198.



git-svn-id: https://core.svn.wordpress.org/trunk@17734 1a063a9b-81f0-0310-95a4-ce76da25c4cd