dashboard: builder changes for performance dashboard
This CL moves code from code.google.com/p/dvyukov-go-perf-dashboard,
which was previously reviewed.

LGTM=adg
R=adg
CC=golang-codereviews
https://golang.org/cl/95190043
7 files changed
tree: 3ddd6b7db7a04ae301893a894698b4a28182d395
  1. app/
  2. builder/
  3. README