Revert "Allow mixins to accept arguments."
Revert "Allow mixins to accept arguments."

This reverts commit aa9dbab0eb151492f3997a473189198f67f2b00a.

Conflicts:

	lib/xmpp/connection.js

xmppjs/xmpp.js,ggozad/node-xmpp,ggozad/node-xmpp,agebrock/node-xmpp,tempbottle/node-xmpp,xmppjs/xmpp.js,qbit/node-xmpp,qbit/node-xmpp,node-xmpp/node-xmpp,agebrock/node-xmpp,WeBest/node-xmpp,eelcocramer/node-xmpp,node-xmpp/node-xmpp,stliu/node-xmpp