add dark xfwm4 theme

common/xfwm4-dark/themerc

@@ -0,0 +1,30 @@
+button_offset=7
+button_spacing=4
+full_width_title=true
+title_horizontal_offset=0
+title_vertical_offset_active=1
+title_vertical_offset_inactive=1
+#title_shadow_active=true
+title_shadow_inactive=true
+
+#button_layout=O|HMC
+
+active_text_color=#afb8c5
+active_text_shadow_color=#2f343b
+inactive_text_color=#808791
+inactive_text_shadow_color=#2f343b
+
+placement_ratio=20
+shadow_delta_height=2
+shadow_delta_width=0
+shadow_delta_x=0
+shadow_delta_y=-10
+shadow_opacity=35
+
+title_shadow_active=false
+
+resize_opacity=100
+move_opacity=100
+popup_opacity=100
+show_frame_shadow=true
+show_popup_shadow=true