Added list of changes in YANG 1.1
Added list of changes in YANG 1.1

Change-Id: Ifc3baeea73b47a1110ba463050b2c10a901e3a35
Signed-off-by: Tony Tkacik <d0658a876d3f3373fb5ecec624b553a76d54e737@cisco.com>

opendaylight/yangtools,opendaylight/yangtools