-implemented map style framework

-Removed all map styles from map_layout
-Converted rail_grid.lua to be compatible with the framework

locale/map_layout/rail_grid.lua

@@ -1,3 +1,5 @@
+mymodule = {}
+
 local function rot_pos(pos, rot)
   local ctr = {x = 15, y = 15}
   return {
@@ -101,11 +103,8 @@ local function disable_items()
   force.recipes["express-underground-belt"].enabled = false
 end
 
-local function on_init()
-  global.map_gen_rng = game.create_random_generator()
-end
 
-local function on_chunk_generated(event)
+function mymodule.on_chunk_generated(event)
   local bd_box = event.area
   local surface = event.surface
   local chunk_size = 32
@@ -131,6 +130,6 @@ local function on_chunk_generated(event)
   end
 end
 
-Event.register(defines.events.on_chunk_generated, on_chunk_generated)
-Event.register(defines.events.on_research_finished, disable_items)
-Event.register(-1, on_init)
+
+
+return mymodule

locale/map_layout/sample.lua

@@ -0,0 +1,26 @@
+--[[
+This is a sample file for a map style. You may register new events, but not on_chunk_generated.
+
+Author: Valansch
+]]--
+
+
+--This is contains the module (Do not remove)
+local module = {}
+
+local example_variable = "foo"
+
+local function helper_function()
+  --helper function code here
+end
+
+--This function is called by the framework if the style is enabled.
+function mymodule.on_chunk_generated(event)
+  game.print("Chunk was generated")
+end
+
+
+
+--(Do not remove)
+return module
+--any code past this point will obviously not be executed