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clean up announcement text

Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
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+===============
+ stevedore 0.3
+===============
+
+.. tags:: stevedore release python
+
+What is stevedore?
+==================
+
+Python makes loading code dynamically easy, allowing you to configure
+and extend your application by discovering and loading extensions
+("*plugins*") at runtime. Many applications implement their own
+library for doing this, using ``__import__`` or
+:mod:`importlib`. stevedore_ avoids creating yet another extension
+mechanism by building on top of `setuptools entry points`_. The code
+for managing entry points tends to be repetitive, though, so stevedore
+provides manager classes for implementing common patterns for using
+dynamically loaded extensions.
+
+.. _stevedore: http://stevedore.readthedocs.org
+
+.. _setuptools entry points: http://packages.python.org/distribute/pkg_resources.html#convenience-api
+
+
+What's New?
+===========
+
+ - Added dispatch managers for selecting among a set of plugins at
+ runtime instead of load time.
+
+Installing
+==========
+
+Visit the stevedore_ project page for download links and installation
+instructions.

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