Change-Id: If9412e0598bdfa59dc142aacaec1cb5ae3f5401d
Change-Id: Ife45b8ec1ad39822491e57b6031927a42f6a113b
Change-Id: Id756d25e475e8f8cb8379577032e5b41e772b88e
Introduce project skeleton such as build envrionment and interfaces to build up code further cooperatively. Change-Id: Ie9ac38991f609d33637283134906d7cc3f2ac19e