Remove xcvb.
Add envy per #582.
Add weblocks-examples per #584. Blacklist the weblocks-provided weblocks-demo.
Move the upstream of clsql-fluid per #583.
Add cl-db3 per #585.
Add cl-read-macro-tokens per #587.
Add hunchentoot-single-signon per per #591.
Change source of cl-emb per #590.
Add sxql per #588. Doesn't build yet though.