Add remove_option(), remove_options(), and get_options() methods to WP_Screen, along with unit tests. props ocean90, DrewAPicture. fixes #25799.

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git-svn-id: http://core.svn.wordpress.org/trunk@26354 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Pass the post type to the `post_type_archive_title` filter for better context. Adds lovely docs. props DrewAPicture. fixes #25605.

Built from https://develop.svn.wordpress.org/trunk@26457


git-svn-id: http://core.svn.wordpress.org/trunk@26355 1a063a9b-81f0-0310-95a4-ce76da25c4cd