[issue25224] Replace Idle's README.txt with annotated file list

[Roundup Robot]

Roundup Robot added the comment:

New changeset 4e62989e3688 by Terry Jan Reedy in branch '2.7':
Issue #25224: README.txt is now an idlelib index for IDLE developers and
https://hg.python.org/cpython/rev/4e62989e3688

New changeset bb1a8d3dd4a1 by Terry Jan Reedy in branch '3.4':
Issue #25224: README.txt is now an idlelib index for IDLE developers and
https://hg.python.org/cpython/rev/bb1a8d3dd4a1

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25224>
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