Update README and screenshot

README.md

@@ -1,4 +1,5 @@
-# worldborder
+World Border
+============
 
 World Border mod by lanxu. This is a Minetest Mod that limits the player movement within square area and shows a stop sign to the player at the border. If the world_border is changed, the player is pushed within the square area.
 
@@ -9,3 +10,24 @@ The border size is by default 500 which produces 500x500 square around origin. T
 ```
 
 This mod may cause players to be pushed inside blocks (and by that I mean it will cause suffocation). Teleporting the moved players to a safe location is something to be implemented in the future.
+
+Version: 1.0
+License: GPL 3.0 or later
+Dependencies: none
+
+Report bugs or request help on the forum topic.
+
+Installation
+------------
+
+Unzip the archive, rename the folder to worldborder and
+place it in minetest/mods/
+
+(  GNU/Linux: If you use a system-wide installation place
+	it in ~/.minetest/mods/.  )
+
+(  If you only want this to be used in a single world, place
+	the folder in worldmods/ in your worlddirectory.  )
+
+For further information or help see:
+http://wiki.minetest.com/wiki/Installing_Mods