Add jquery and flot to catapult/third_party.

Add jquery and flot to catapult/third_party.

This is not strictly necessary, since dashboard can always use the CDN versions of jquery and flot. I'm not sure if there's any good reason to do use local copies of jquery and flot except for:
 - What if the CDN went down or got hijacked?
 - What if someone wanted to test locally with no network?

Thoughts?

BUG=488609
Committed: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+/a43b4c0fcc8c9fb51decc4cf3dd2f4f059ffcc31

[qyearsley, 2015-07-13 17:00:45]

qyearsley@chromium.org changed reviewers:
+ sullivan@chromium.org

[sullivan, 2015-07-13 17:03:02]

lgtm

I think your reasons above are good reasons to have these in 3rd party.

[qyearsley, 2015-07-13 17:11:18]

The CQ bit was checked by qyearsley@chromium.org

[commit-bot: I haz the power, 2015-07-13 17:11:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1235773002/1

[commit-bot: I haz the power, 2015-07-13 17:18:54]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-07-13 17:18:56]

Try jobs failed on following builders:
  Catapult Windows Tryserver on master.tryserver.client.catapult (JOB_FAILED,
https://build.chromium.org/p/tryserver.client.catapult/builders/Catapult%20Wi...)

(exceeded global retry quota)

[qyearsley, 2015-07-16 17:31:55]

The CQ bit was checked by qyearsley@chromium.org

[qyearsley, 2015-07-16 17:31:56]

The patchset sent to the CQ was uploaded after l-g-t-m from
sullivan@chromium.org
Link to the patchset: https://codereview.chromium.org/1235773002/#ps10001
(title: "Rebased")

[commit-bot: I haz the power, 2015-07-16 17:32:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1235773002/10001

[commit-bot: I haz the power, 2015-07-16 17:38:30]

Committed patchset #2 (id:10001) as
https://chromium.googlesource.com/external/github.com/catapult-project/catapu...