buildout.cfg: changed isolated python version to v2.7.6.19
buildout.cfg: changed isolated python version to v2.7.6.20
buildout.cfg: changed isolated python version to v2.7.6.21
ignore 'already deleted' when calling property_collector.Destroy
wait_for_tasks should not change given list
HostSystemCachedPropertyCollector._get_select_set: fixing traversal in folder->folder
VirtualMachinePropertyCollector._get_select_set: fixing traversal in folder->vapp
Finished release v0.1.4.