webtry: More README doc cleanups.

webtry: More README doc cleanups.

Puts it much more in sync with the README in perf/.

BUG=None
TEST=None
R=jcgregorio@google.com

Committed: https://skia.googlesource.com/skia/+/b1dfb03685d707bfcb21347f0236cee0c6958303

[jcgregorio, 2014-10-01 13:39:30]

On 2014/10/01 01:59:00, tfarina wrote:

LGTM

[tfarina, 2014-10-01 14:06:26]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-10-01 14:07:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/615313002/1

[commit-bot: I haz the power, 2014-10-01 14:08:56]

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

[commit-bot: I haz the power, 2014-10-01 14:08:58]

Try jobs failed on following builders:
  Build-Ubuntu13.10-GCC4.8-x86_64-Release-Trybot on client.skia.compile ()

[tfarina, 2014-10-01 14:12:43]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-10-01 14:13:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/615313002/1

[commit-bot: I haz the power, 2014-10-01 14:14:48]

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

[commit-bot: I haz the power, 2014-10-01 14:14:49]

Try jobs failed on following builders:
  Build-Ubuntu13.10-GCC4.8-x86_64-Release-Trybot on client.skia.compile ()

[tfarina, 2014-10-01 15:30:28]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-10-01 15:31:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/615313002/1

[commit-bot: I haz the power, 2014-10-01 16:19:03]

Committed patchset #1 (id:1) as b1dfb03685d707bfcb21347f0236cee0c6958303