Install PloneSVNView

1. Get and install pysvn: http://pysvn.tigris.org/. PloneSVNView has
   been tested with pysvn 1.1.2.

1. Place the PloneSVNView directory inside the Products folder of your
   Plone installation.

2. Restart Plone

3. Go to plone setup, Add/Remove Products and install PloneSVNView

4. Add an "SVN View" somewhere where you want to display
   Subversion-hosted source code.