Buildbot Dashboard - Tweak layout, add build page viewer
Buildbot Dashboard - Tweak layout, add build page viewer

Unreviewed, work in progress; will request review when in a more complete form.

git-svn-id: 32fc27f4dcfb6c0385cd9719852b95fe6680452d@6672 2bbb7eff-a529-9590-31e7-b0007b416f81

google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,Tiger66639/skia-buildbot,Tiger66639/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot