Included a note in the Transfer Volume section.

Inlcuded a note in the Transfer Volume section about the assumption that both the donor and
recipient are within the same cloud.
Closes-bug: 1254429

Change-Id: I147ade56156f2bbeec578199fbfd7eb51568b7ca
Fixes a typo in Architecture

Closes-bug:#1258606

Change-Id: I61ed701fdf2cc04721ae1093d6ea4b7554870c46
backport: havana
Merge "Fixes a typo in Architecture"
Merge "Included a note in the Transfer Volume section."