doc: Retitled document.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Retitled document. Made example generic. Fixed link.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Removed references to OpenSuse and SLES.

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