Revert "Make ERP5 use Zope 2.13 (and Python 2.7)"

This reverts commit a9bd7844726b13dc0d64ee136f169d6bfa039376.
version up : Zope2 2.12.28.
version up : python 2.6.9.
Revert "Make cloudooo use Python 2.7"

This reverts commit 658abab99eb0c897c8d4d3cf3c469b3551b87300.

Conflicts:
	software/cloudooo/software.cfg