Update spec. with screenshots

doc/theme3/specification.md

@@ -499,6 +499,8 @@ The following properties are currently supports:
 
 A simple theme showing basic theming and transparent background:
 
+![example arthur](example-arthur.png)
+
 ```css
 * {
     foreground:  #ffeedd;
@@ -600,6 +602,8 @@ A simple theme showing basic theming and transparent background:
 
 The previous theme modified to behave like a sidebar, positioned on the left of the screen.
 
+![example sidebar](example-sidebar.png)
+
 ```css
 * {
     foreground:  #ffeedd;
@@ -713,6 +717,8 @@ The previous theme modified to behave like a sidebar, positioned on the left of
 
 A theme that shows a floating inputbar.
 
+![example paper float](example-paper-float.png)
+
 > TODO: cleanup this theme.
 
 ```css

script/rofi-create-screenshot-theme3.sh

@@ -87,6 +87,8 @@ export DISPLAY=${VDISPLAY}
 
 # Create fake X11
 create_fake_x ${VDISPLAY}
+sleep 1
+fluxbox &
 sleep 1;
 compton -b 
 feh --bg-center background.jpg