Overall: updated my copyright years.
Azoth: added UsersListWidget.
Azoth: moved KeyboardRosterFixer to separate file.
Azoth: install KeyboardRosterFixer on UsersListWidget.
Azoth: ChatTab::ShowUsersList().
Azoth: avoid a dumb warning.
Azoth: MUC users list action.
Merge branch 'master' of github.com:0xd34df00d/leechcraft