Re-land "Check in a simple pure-python based Markdown previewer."

Re-land "Check in a simple pure-python based Markdown previewer."

This re-lands #352450 with a fix to make checklicenses.py happy.

R=thestig@chromium.org
TBR=jam@chromium.org

Committed: https://crrev.com/27c171cd168807f85b95ae8aaa797bda02eff319
Cr-Commit-Position: refs/heads/master@{#352731}

[Dirk Pranke, 2015-10-06 23:56:47]

@thestig - Can I get an OWNERS approval for the checklicenses change?

[Lei Zhang, 2015-10-07 00:01:34]

LGTM

I https://github.com/waylan/Python-Markdown/issues their bug tracker? Can you
kindly ask them to fix this issue, so that we can remove the exception in the
future?

[Dirk Pranke, 2015-10-07 00:23:57]

Patchset #3 (id:40001) has been deleted

[Dirk Pranke, 2015-10-07 00:24:38]

On 2015/10/07 00:01:34, Lei Zhang wrote:
> LGTM
> 
> I https://github.com/waylan/Python-Markdown/issues their bug tracker? Can you
> kindly ask them to fix this issue, so that we can remove the exception in the
> future?

I have asked: https://github.com/waylan/Python-Markdown/issues/435

[Dirk Pranke, 2015-10-07 00:24:56]

The CQ bit was checked by dpranke@chromium.org

[Dirk Pranke, 2015-10-07 00:24:56]

The patchset sent to the CQ was uploaded after l-g-t-m from thestig@chromium.org
Link to the patchset: https://codereview.chromium.org/1392733002/#ps60001
(title: "clarify comment re: licenses, add bug #, use --no-find-copies")

[commit-bot: I haz the power, 2015-10-07 00:25:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1392733002/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1392733002/60001

[commit-bot: I haz the power, 2015-10-07 00:44:49]

Committed patchset #3 (id:60001)

[commit-bot: I haz the power, 2015-10-07 00:45:41]

Patchset 3 (id:??) landed as
https://crrev.com/27c171cd168807f85b95ae8aaa797bda02eff319
Cr-Commit-Position: refs/heads/master@{#352731}