doc: Added troubleshooting entry for single OSD and single replica.

fixes: #3327

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Addressed confusion with version numbering.

fixes: #4411

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Fixed usage and added note for copying keyring to client. Added hyperlinks.

fixes: #4373

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Setting should use network not single IP.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
Merge git://github.com/ceph/ceph