Upgrade protobufs dep 2.6.1, plus README

Change-Id: Icff02d0d718b4ae0ddd5cb0023007866a1b89538
Signed-off-by: Galo Navarro <galo@midokura.com>
Merge "Upgrade protobufs dep 2.6.1, plus README"
Add topology service protocol

Change-Id: If362897862b7f4f87b98d9e90fbeff1d965d0465
Signed-off-by: Galo Navarro <galo@midokura.com>
WIP

Change-Id: I6936e887a317ffc0a0f18165041ee5c722606c4a
Signed-off-by: Galo Navarro <galo@midokura.com>