Fixed pep8 and pylint files, added utils

Added Command, a shell command runner.

BUG=None
TEST=run_all_tests.py

Change-Id: Ib51813f5346293453922bddc7d08db8a41febd36
Reviewed-on: https://chromium-review.googlesource.com/182752
Reviewed-by: Ben Chan <benchan@chromium.org>
Tested-by: Byron Kubert <byronk@chromium.org>
Reviewed-by: Byron Kubert <byronk@chromium.org>
Commit-Queue: Byron Kubert <byronk@chromium.org>
8 files changed