Add readme.md mostly taken from the forum thread (and markdown-ified)

Updated several mods: castles, homedecor, digilines, farming redo,
jumping, maptools, mesecons, moreblocks, moretrees, pipeworks,
signs_lib, technic, unified_dyes

Deleted the peaceful_npc mod, as it is broken and unmaintained.

anvil/init.lua

@@ -368,6 +368,6 @@ minetest.register_craft({
 	recipe = {
                 {"default:steel_ingot","default:steel_ingot","default:steel_ingot"},
                 {"default:steel_ingot","default:steel_ingot","default:steel_ingot"},
-                {'',                   "group:stick",      ''                   } }
+                {"group:stick", '', ''} },
 })