doc: Removed mkcephfs references. Did a bit of clean-up work.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Updated APT script for dumpling.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Updated script for dumpling.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Removed mkcephfs references.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Removed old mkcephfs references.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>