No longer generate "py-" scripts implicitly.  We no longer create one
for zc.buildout when bootstrapping.

Added an error-reporting API for use by recipes.

Added a help command-line option.

Fixed a bug in the way that recipe eggs were loaded.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@69990 62d5b8a3-27da-0310-9561-8e5933582275