doc: Nomenclature update.

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

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

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

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Added trouble shooting entry. Fixed formatting.

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