Add diff screens for unified and side-by-side diff
Side-by-side diff against base is available at:
/#/x/xdocs/c/<change-id>/<patch-set>/<file>
Unified diff against base is available at:
/#/x/xdocs/c/<change-id>/<patch-set>/<file>,unified
If two patch sets should be compared, they must be specified seperated
by '..':
/#/x/xdocs/c/<change-id>/<patch-set-A>..<patch-set-B>/<file>
/#/x/xdocs/c/<change-id>/<patch-set-A>..<patch-set-B>/<file>,unified
For now there are no links to these screens; they can only be invoked
if the URL is manually entered.
Change-Id: Id2b09d0d4ccae0e6da26d7f2ad9ac9641c9407dd
9 files changed
