title: How to setup for development of plone products
body: <p>I want to develop a few products for a defined Plone install/version, which I cannot change (3.3.5).</p>
  
  <p>What is the best way to organize my source tree, so that I do not have to put a huge plone instance into source control that won't change anyway? I still want to use buildout for local checking, though...</p>
  
  <p>What do you recommend?</p>
  
  <p>I am on Windows and prefer git to hg, but can live with both...</p>