add missing script coming from unlinked artlog toolbox project

not mandatory but consistent to have all code

Signed-off-by: philippe lhardy <philippe.lhardy@astrolabe.coop>

README.md

@@ -34,11 +34,11 @@ and output
   * txt labyrinth as text
   * we minetest/luanti world edit format
 
-===== BUILD =====
+## BUILD
 
 See BUILD.md
 
-===== INSTALL =====
+## INSTALL
 
 obtain laby.zip directly build or from you own build ( see BUILD above ).
 
@@ -48,11 +48,10 @@ unzip laby.zip
 
 it will create  a artloglaby directory.
 
-===== RUN =====
+## RUN
 
 run it on a Linux distribution with :
 
-
 ```
 cd artloglaby ; ./laby.sh
 ```