Rofi Launcher w/ Greenclip Manager

- Add greenclip daemon to autostart
- Add background processes section to autostart
- Remove references to dmenu
- Add rofi run and clipboard shortcuts
- Update man page to reference rofi instead of dmenu

dwm.c

@@ -1922,8 +1922,6 @@ sigchld(int unused)
 void
 spawn(const Arg *arg)
 {
-	if (arg->v == dmenucmd)
-		dmenumon[0] = '0' + selmon->num;
 	if (fork() == 0) {
 		if (dpy)
 			close(ConnectionNumber(dpy));