R1:8a906b0e18a7

Remove skins from Phame

Summary:
Ref T9897. Purge a bunch of stuff:

- Remove skins.
- Remove all custom sites for skin resources.
- Remove "framed", "notlive", "preview", separate "live" controllers (see below).
- Merge "publish" and "unpublish" controllers into one.

New behavior:

- Blogs and posts have three views:
- "View": Internal view URI, which is a normal detail page.
- "Internal Live": Internal view URI which is a little prettier.
- "External Live": External view URI for…