This reverts commit 7095a385.

This reverts commit caef8700.

This permit projects add a default list without overwrite the method.

Move from _install and create installZopeStandalone.
Introduced thread_amount_per_zope
Define default number of threads as 4, instead 1.

The configurator.json will be used to validate the parameters, and
provide an API add parameters.

This reverts commit 6e73e829.

From original changelog:

- Fixed a serious privilege escalation issue. For more information see:
  http://plone.org/products/plone/security/advisories/20110622

This reverts commit e037031d.

In case if profile overrides another one and adds new list like:

[local-bt5-repository]
list += something

something will be separated by newline instead of space. Thanks to iterating
over such quoted list it is possible to give maximum flexibility in overriding.