imports from libregamewiki and some cvs to git conversions

entries/minetest_game.md

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+# Minetest Game
+
+_Simple and peaceful “sandbox game” based on Minetest._
+
+- Home: https://github.com/minetest/minetest_game/
+- State: mature
+- Keywords: simulation, open content, sandbox
+- Code repository: https://github.com/minetest/minetest_game.git
+- Code language: Lua
+- Code license: LGPL-2.1
+- Code dependencies: Minetest
+- Assets license: CC-BY-SA-3.0
+
+## Building