backend, psql: implemented notifications for auto subscribers in PEP: people with presence permission from node owner and who request notification (+notify) from node will receive notifications according to XEP-0163 §4. This make SàT Pubsub a nearly fully compliant PEP service. Following features are still missing: - presence access model, should be implemented very soon as everything is already there - deleting resource on unavailable presence, will be implemented really soon - XEP-0115 hash check - and most importantly, rosters updates. XEP-0356 needs to be updated for this.

v. 0.2 (02/12/2015):
	- schema updated (unversioned => version 1)
	- sync with Idavoll
	- use of sat.tmp.wokkel as a workaround for change not merged upstream
	- RSM (XEP-0059) implementation
	- MAM (XEP-0313) implementation
	- Namespace Delegation (XEP-0355) implementation
	- Privileged Entity (XEP-0356) implementation
	- removed remote-roster hack
	- SàT PubSub can be used as a PEP service (PEP implementation not complete yet)
	- item publisher is enforced
	- categories handling (not complete)

v 0.1.1 (09/09/2014):
    bugfix release

v 0.1.0 (24/02/2014):
    ** FIRST PUBLIC RELEASE **