package version metadata for external/

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Change-Id: Ic7c9e46e9eb2fd75ce593a77fdc46ba4e3348f7f

README.version

diff --git a/README.version b/README.version
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+URL: https://pypi.python.org/packages/source/M/Markdown/Markdown-2.0.3.tar.gz#md5=751e8055be2433dfd1a82e0fb1b12f13
+Version: 2.0.3
+BugComponent: 25699