Restore files lost during the git conversion

Taken from svn.zope.org r122016:
http://zope3.pov.lt/trac/browser/zope.errorview/trunk?rev=122016

  svn co -r 122016 svn://svn.zope.org/repos/main/zope.errorview/trunk zope.errorview
Update to latest bootstrap.py

Downloaded from https://bootstrap.pypa.io/bootstrap-buildout.py