setuptools as one of its dependencies, we now treat setuptools as an 
  implicit dependency.  We generate a warning if the distribution
  is a develop egg.

- Remove old develop egg links. This requires storing the old link
  paths in .installed.cfg.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@70578 62d5b8a3-27da-0310-9561-8e5933582275