Switch Twitter oEmbed to SSL due to a Twitter API change. Ah, the open web.

props yurivictor, cojennin.
see #26844.


git-svn-id: https://develop.svn.wordpress.org/trunk@26967 602fd350-edb4-49c9-b593-d223f7449a82
Realign the oEmbed providers. see #26844.


git-svn-id: https://develop.svn.wordpress.org/trunk@26968 602fd350-edb4-49c9-b593-d223f7449a82