add bspwm config and use as default WM

.config/bspwm/bspwmrc

@@ -0,0 +1,21 @@
+#! /bin/sh
+
+sxhkd &
+~/.config/bspwm/panel &
+xdo lower $(xdo id -a panel)
+
+bspc monitor -d 1 2 3 4 5 6 7 8 9 0
+
+bspc config border_width         2
+bspc config window_gap           12
+
+bspc config normal_border_color '#808080'
+bspc config focused_border_color '#3585ce'
+bspc config presel_feedback_color '#3585ce'
+
+bspc config split_ratio          0.50
+bspc config single_monocle       true
+bspc config borderless_monocle   true
+bspc config gapless_monocle      true
+
+bspc rule -a Gimp desktop='^8' state=floating follow=on