* Don't traceback when another resource of us is moving contacts to new/different groups.
* Always refilter all involved groups.
* It is now possible to not update contacts severside when using add/remove_from_groups
* Added NS_RECEIPTS to protocol namespace list.
* Show our support of XEP-0184 in caps.
* Added a big, fat warning to get_contact as this does not work as
expected.
* There was some strangeness in our XEP-0022, it added an id tag to
the x tag, which isn't mentioned anywhere in the XEP. And for some
strange reason, that id even was the same all the time.
* Fixed a typo.
* Change metacontact ordering. Fallback to priority only if two contacts have the same show, not the other way round.
* Move contacts that just signed out to the bottom of the group, not to the top.
-Use a method to get_shown_groups (possibly more work to do (special group attribute))
-Show contact only if contact.ask, not according to modified xep 0162 logic. (I don't get neither the xep
meaning, neither this modified logic, can you explain steve-e ?)
-Remove contact before we modify it req_sub(). Else we can't remove it because iter is not found.
-When removing a contact and we let him in see us (observer), manually set show to offline, so he is not set as
visible.
-Remove observer from observer group if we asked him auth (I mean before he answer). Xep 0162 say he is not an
observer then. Fix contact staying in observer group when we get auth later.
-Renaming groups seems fixed (it's an accident :p )
More work on group to follow
* don't traceback when selfcontact is disconnecting
* make more use of "remove contact after last event removed" mechanism
* correctly redraw bigbrothers after status change
* handle situation where we receive a message, go offline without reading it and reconnect after another resource has moved the sending contact to another group.
know bugs: newly added transports added to "not in roster group"
* show correct expand icon for metacontacts in different groups
* only redraw parent when really necessary
* remove obscure code
* fix draw_parent_contact