Optimized images

Change-Id: Ic4766618d4b5dd24b20e8761a1f9c56440844e15
Optipng -nc -nb -o7

Change-Id: I1df1f2fbb25d0835ba942e8dfdf4415bb2b83c0d
TRDS: Darker Gallery

Change-Id: I632b252280118f61f356f4a6dae1039e02b82241
fix for old trds

Change-Id: I099be86f100fbb90e774be6b932d191b44feb22d
Signed-off-by: scott <scott@ubuntu>