Change pithos default container policy quota to unlimited
Refs: #3543
Merge branch 'feature-snf-django' into develop
Conflicts: docs/older/Changelog.pithos-app snf-astakos-app/astakos/im/api/__init__.py snf-pithos-app/pithos/api/util.py
Merge branch 'release-0.13' into develop
Conflicts: snf-astakos-app/astakos/im/messages.py
Make all Changelog files prior to 0.13 obsolete
Since v0.13, all Synnefo components will have the same version and thesame Changelog, NEWS, Upgrade, Copyright file. This patch addressesold Changelog, NEWS and Upgrade files: