doc: Added documenting Ceph to the toc tree.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Added Documenting Ceph (draft) document.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Adding more information on style and usage for documenting Ceph.

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

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Updated pull request with suggested changes.

signed-off by: John Wilkins <john.wilkins@inktank.com>
doc: Updated sign-off by to sign-off-by

sign-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Added init caps to Signed-off-by: and Fixes:

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
Merge pull request #1310 from ceph/wip-doc-documenting-ceph

Wip doc documenting ceph

Reviewed-by: Sage Weil <sage@inktank.com>