Escape text for markdown when updating from pending or committed changes.

Review Request #5006 — Created Nov. 18, 2013 and submitted — Latest diff uploaded

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Review Board
master

Reviewers

Escape text for markdown when updating from pending or committed changes.

When updating from a pending changelist (perforce) or a committed change
description (svn or git), we may need to escape the description and/or testing
done fields. This adds the relevant calls to do so.

Ran unit tests.