owncloud/core — pull request #7670 by georgehrke (2014-03-11 13:23:29+00:00)
Title: use preDelete instead of postDelete hook

:warning::warning::warning: DO NOT MERGE YET :warning::warning::warning:

use preDelete instead of postDelete hook.
based on https://github.com/owncloud/core/pull/7668 and https://github.com/owncloud/core/pull/7669