Added fresh bootstrap.py from http://downloads.buildout.org/1/bootstrap.py

This is for zc.buildout 1.x.
Added buildout-versions extension so we can see what is not pinned.
Pin all versions.
Explicitly downgrade collective.z3cform.widgets to 1.0b3.

1.0b4 has updated dependencies, which sounds good,
but it also loads the zcml of all those dependencies,
which include zope.i18n and that gives a zcml conflict with the Zope2 egg.
More pinnings.