Add new theme "quinx".

configure

configure.in

themes/Makefile.am

themes/Makefile.in

themes/quinx/Makefile.am

themes/quinx/Makefile.in

themes/quinx/README

themes/quinx/bottom-active.xpm

themes/quinx/bottom-inactive.xpm

themes/quinx/bottom-left-active.xpm

themes/quinx/bottom-left-inactive.xpm

themes/quinx/bottom-right-active.xpm

themes/quinx/bottom-right-inactive.xpm

themes/quinx/close-active.xpm

themes/quinx/close-inactive.xpm

themes/quinx/close-pressed.xpm

themes/quinx/hide-active.xpm

themes/quinx/hide-inactive.xpm

themes/quinx/hide-pressed.xpm

themes/quinx/left-active.xpm