ota: Fix invocation of AppendAssertions

it now takes a dict, not the zip object

Change-Id: I14f6eb695960f05e85fe4821e6408eec0ba7a59e
Optimized all png's.

Change-Id: I6b9a374b08a567e92c024df8d16844e7859f8cf7
to: optipng -nc -nb -o7
Stweaks Support

Change-Id: I5ea72126ba84a2e2346fcbeb55ece5117ea1fdc7
Overlay: Use fade out animation instead of crt-off animation

Change-Id: Ib98a70ec828965ab38a333653cf9a1ebaae050f7
wifi.supplicant_scan_interval: 15 -> 30

Change-Id: I93a160e02367ec936980751846338e3fe281fcf6