Convert README.txt to Markdown format

README.md

+# Minetest Game
+
+The default game bundled in the Minetest engine.  
+
+For further information, check [this forum topic](https://forum.minetest.net/viewtopic.php?f=15&t=9724).   
+Also see the [Minetest Wiki](https://wiki.minetest.net/Subgames/Minetest_Game) for more information.
+
+## Installation
+
+- Unzip the archive, rename the folder to minetest_game and
+place it in .. minetest/games/
+
+- GNU/Linux: If you use a system-wide installation place
+    it in ~/.minetest/games/.
+
+The Minetest engine can be found at
+	[GitHub](https://github.com/minetest/minetest).
+
+For further information or help, see:  
+https://wiki.minetest.net/Installing_Mods
+
+## Compatibility
+
+The Minetest Game GitHub master HEAD is generally compatible with the GitHub
+master HEAD of the Minetest engine.  
+Additionally, when the Minetest engine is tagged to be a certain version (e.g.
+0.4.10), Minetest Game is tagged with the version too.
+
+When stable releases are made, Minetest Game and the Minetest engine is packaged and made available at
+	https://minetest.net/downloads/
+
+## Licensing
+
+See `LICENSE.txt`

README.txt

-Minetest Game [minetest_game]
-=============================
-The main game for the Minetest engine
-=====================================
-
-To use this game with the Minetest engine, insert this repository as
-	/games/minetest_game
-
-The Minetest engine can be found in:
-	https://github.com/minetest/minetest/
-
-Compatibility
---------------
-The Minetest Game github master HEAD is generally compatible with the github
-master HEAD of the Minetest engine.
-
-Additionally, when the Minetest engine is tagged to be a certain version (eg.
-0.4.10), Minetest Game is tagged with the version too.
-
-When stable releases are made, Minetest Game is packaged and made available in
-	http://minetest.net/downloads/
-and in case the repository has grown too much, it may be reset. In that sense,
-this is not a "real" git repository. (Package maintainers please note!)
-
-Licensing
----------
-
-See LICENSE.txt