Webworld docs: move gameinfo documentation to their world folders and copy them for webhost use. (#455)

worlds/factorio/docs/en_Factorio.md

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+# Factorio
+
+## Where is the settings page?
+
+The [player settings page for this game](../player-settings) contains all the options you need to configure and export a
+config file.
+
+## What does randomization do to this game?
+
+In Factorio, the research tree is shuffled, causing certain technologies to be obtained in a non-standard order. Recipe
+costs, technology requirements, and science pack requirements may also be shuffled at the player's discretion.
+
+## What Factorio items can appear in other players' worlds?
+
+Factorio's technologies are removed from its tech tree and placed into other players' worlds. When those technologies
+are found, they are sent back to Factorio along with, optionally, free samples of those technologies.
+
+## What is a free sample?
+
+A free sample is a single or stack of items in Factorio, granted by a technology received from another world. For
+example, receiving the technology `Portable Solar Panel` may also grant the player a stack of portable solar panels, and
+place them directly into the player's inventory.
+
+## What does another world's item look like in Factorio?
+
+In Factorio, items which need to be sent to other worlds appear in the tech tree as new research items. They are
+represented by the Archipelago icon, and must be researched as if it were a normal technology. Upon successful
+completion of research, the item will be sent to its home world.
+
+## When the engineer receives an item, what happens?
+
+When the player receives a technology, it is instantly learned and able to be crafted. A message will appear in the chat
+log to notify the player, and if free samples are enabled the player may also receive some items directly to their
+inventory.