RSM improvments/refactoring: - a warning message is displayed if maxItems == 0 in getItems, and an empty list is returned in this case - use the new container.ItemData instead of doing tuple (un)packing - the list of ItemData => list of domish.Element conversion is done at the end of the workflow - rsm request is checked in self._items_rsm directly - better handling of Response.index in _items_rsm - itemsIdentifiers can't be used with RSM (the later will be ignored if this happen) - don't do approximative unpacking anymore in _items_rsm - countItems and getIndex have been refactored and renamed getItemsCount and getItemsIndex, don't use query duplications anymore - cleaned query handling in getItems - /!\ mam module is temporarly broken

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 **