Adds buttons on the side, disabled at the start and end of the list of
images, that let you browse through the images on the page!
Also arrow keys!
EXCITING!
Change-Id: Ie514cd4b16bdee8a384a89d4bd1d755a24c5cdb4
There's just no other adjective for this, it is _super_ nice.
There may be refinements later as the designers get things together.
Bug: 56499
Change-Id: I200684a19c190444587f520595186e9ae5afbea6
Keep modules in separate dirs, move images to their module dirs, and fix
up the module declarations so they still work.
Also moved viewer.svg into the root.
Bug: 56421
Change-Id: Ia84ddfd3b91c784c42d9ba243c5cfd46354f139f
