XEP 0045 (muc) : Add reason support for SetAffiliation
XEP 0045 (muc) : Add setRole function
XEP 0045 (muc) : add GetMembers and SetMembers support
XEP 0045 (muc) : add kick and ban shortcuts
Merge remote-tracking branch 'remotes/origin/xep0045_complements' into experimental

Conflicts:
	sleekxmpp/plugins/xep_0045.py