Add little API.

README.md

@@ -16,7 +16,50 @@ For the Mods: Subgames, Skywars, Hiddenseeker, Mesewars, Main, Build:
 
 You are not allowed to distribute any copy or work based on this programm unless the copyright
 holder declares his consent.
-HERE IS NO WARRANTY OF ANY KIND!
+THE SOFTWARE IS PROVIDED WITHOUT WARRANTY OF ANY KIND!
 
 
 Derived from [minetest_game](https://github.com/minetest/minetest_game)
+
+API
+---
+
+The Server is splitted into diffrent lobbys.
+
+This is saved in player_lobby[name] = "main"
+
+All minetest registers like minetest.register_on_join_player(func(player)) are here subgames.register_on_join_player(func(player, lobby)) lobby is the name string of the Lobby where the Action happens.
+
+But not all registers are supported yet.
+
+Example:
+
+subgames.register_on_join_player(function(player, lobby)
+  if lobby == "main" then
+    minetest.chat_send_play(player:get_player_name(), "HI")
+  end
+end)
+
+IMPORTANT: Registers like on_place_node don't allways have a player!
+For this a Lobby must register its location at the top of mods/subgames/init.lua
+
+areas={
+  ["mesewars"] = {
+    [1] = {x=(-76), y=158, z=154},
+    [2] = {x=266, y=(-52), z=(-169)}
+  },
+  ["main"] = {
+    [1] = {x=(-31), y=623, z=0},
+    [2] = {x=9, y=595, z=39}
+  },
+  ["hiddenseeker"] = {
+    [1] = {x=0, y=(-10000), z=0},
+    [2] = {x=0, y=(-10000), z=0}
+  },
+  ["skywars"] = {
+    [1] = {x=10000, y=1900, z=10000},
+    [2] = {x=(-10000), y=2900, z=(-10000)}
+  }
+}
+
+The API is not finished!