AnimateTo performs a slerp, so can't perform a full revolution;
AnimateBy does a linear interpolation of the passed in value, so
initializing it with an AxisAngle property value can perform more
than one revoltion.
Change-Id: I233840024556fe3844d321dd2577ef181e6d8e19 Signed-off-by: David Steele <david.steele@samsung.com>