Add note about --prefix, so people don't have to mail the list if they can't find any plugins
Add note about --prefix, so people don't have to mail the list if they
can't find any plugins

svn path=/trunk/kdenetwork/kopete/; revision=192110

josh-wambua/kopete,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,Jtalk/kopete-fork-xep0136,Jtalk/kopete-fork-xep0136,Jtalk/kopete-fork-xep0136,josh-wambua/kopete,josh-wambua/kopete