Fixes some of the bad data problems

Also has more support for plotting results.

BUG=chromium-os:14650
TEST=alex

Change-Id: I532c4c0027c9cd35711211a88d664a19cfb062a1
Reviewed-on: http://gerrit.chromium.org/gerrit/7954
Tested-by: Paul Taysom <taysom@google.com>
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
13 files changed