Finalize list of default whitelisted options

Here's the list of whitelisted options currently:
- admin_email
- advanced_edit
- avatar_default
- avatar_rating
- blacklist_keys
- blogdescription
- blogname
- blog_charset
- blog_public
- blog_upload_space
- category_base
- category_children
- close_comments_days_old
- close_comments_for_old_posts
- comments_notify
- comments_per_page
- comment_max_links
- comment_moderation
- comment_order
- comment_registration
- comment_whitelist
- cron
- date_format
- default_category
- default_comments_page
- default_comment_status
- default_email_category
- default_link_category
- default_pingback_flag
- default_ping_status
- default_post_format
- default_role
- gmt_offset
- gzipcompression
- hack_file
- html_type
- image_default_align
- image_default_link_type
- image_default_size
- large_size_h
- large_size_w
- links_recently_updated_append
- links_recently_updated_prepend
- links_recently_updated_time
- links_updated_date_format
- link_manager_enabled
- mailserver_login
- mailserver_pass
- mailserver_port
- mailserver_url
- medium_size_h
- medium_size_w
- moderation_keys
- moderation_notify
- ms_robotstxt
- ms_robotstxt_sitemap
- nav_menu_options
- page_comments
- page_for_posts
- page_on_front
- permalink_structure
- ping_sites
- posts_per_page
- posts_per_rss
- recently_activated
- recently_edited
- require_name_email
- rss_use_excerpt
- show_avatars
- show_on_front
- sidebars_widgets
- start_of_week
- sticky_posts
- stylesheet
- subscription_options
- tag_base
- template
- theme_switched
- thread_comments
- thread_comments_depth
- thumbnail_crop
- thumbnail_size_h
- thumbnail_size_w
- timezone_string
- time_format
- uninstall_plugins
- uploads_use_yearmonth_folders
- upload_path
- upload_url_path
- users_can_register
- use_balanceTags
- use_smilies
- use_trackback
- widget_archives
- widget_categories
- widget_image
- widget_meta
- widget_nav_menu
- widget_recent-comments
- widget_recent-posts
- widget_rss
- widget_rss_links
- widget_search
- widget_text
- widget_top-posts
- WPLANG

Here's a list of options I'm torn about
- stylesheet
- template
- current_theme
- active_plugins

In addition, I'm a little concerned about `mailserver_pass`. It seems like a bad idea to be exporting and importing a password, but if we don't include that, it could really ruin someone's day.