Revising cds2014 samples based on first round of feedback.

Revising cds2014 samples based on first round of feedback.

Adding water.cc to commit history.
Sample changed to reduce the need to understand row-major, changed doc to match.
Changing python codelab to run locally.
Pulling in new web devenv version with better copy paste.

BUG=None
R=jmedley@chromium.org
TBR=binji@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/a45f6b81f3cb191b3dc70eb77fc95e921709c34e

[jpmedley, 2014-11-17 21:52:28]

LGTM

[bradn, 2014-11-17 22:05:39]

going to land tbr from ben to get more group feedback, as he's out for a bit.

[commit-bot: I haz the power, 2014-11-17 22:07:46]

Patchset 2 (id:??) landed as
https://crrev.com/a45f6b81f3cb191b3dc70eb77fc95e921709c34e
Cr-Commit-Position: refs/heads/master@{#304492}

[bradn, 2014-11-17 22:07:55]

Committed patchset #2 (id:20001) manually as
a45f6b81f3cb191b3dc70eb77fc95e921709c34e (presubmit successful).

[binji, 2014-11-17 22:50:29]

lgtm