added external rules for bspwm

.config/bspwm/external-rules

@@ -0,0 +1,12 @@
+#!/bin/sh
+wid=$1
+class=$2
+instance=$3
+
+case $class in
+	('')
+		case $(ps -p "$(xdo pid $id)" -o comm= 2>/dev/null) in
+			(qemu-system-x86) echo state=floating;;
+		esac;;
+esac;
+