Improve layout on mobile.

There is still a lot of work to do on mobile, but this makes it
slightly better. Increases the default scale to something sane.
Fix the bug where we don't layout using entire width.

window.outerWidth is somehow completely busted on mobile.

Change-Id: Id574d6ee14ba59f6e835725d378f228796ff7ccf
Merge "Improve layout on mobile."
Fix build on 32-bit platforms (e.g. Android)

Change-Id: Id5feff31ed103aeaaebf9b3e09a5e8a03b572a2d
Merge branch 'master' of https://camlistore.googlesource.com/camlistore