* Remove call to add_option() during admin_init.
* Rework _s_get_theme_options() so that it merges default values into the stored settings.
* Rework _s_theme_options_validate() to only return recognized values if they are present in the $_POST request - only store what is absolutely necessary.
* Updated the docs in a few places.
* Note: _s now requires PHP5. see L161 array_intersect_key().
git-svn-id: https://wpcom-themes.svn.automattic.com/_s/@9483 d957f892-c61d-0410-b221-f235e6eecf30