Release-notes for release-3.5

Change-Id: I3b1ae7c0fcb2c101feaa9c69b6cb0c8657ed0a6b
BUG: 1049981
Signed-off-by: Satheesaran <satheesaran@gmail.com>
Signed-off-by: Vijay Bellur <vbellur@redhat.com>
Reviewed-on: http://review.gluster.org/7412
Reviewed-by: Lalatendu Mohanty <lmohanty@redhat.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>