imports from libregamewiki, conversions cvs to git, correcting keywords and code dependencies

entries/teeworlds.md

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+# Teeworlds
+
+_Cartoon style 2D multiplayer platform shooter game (or third person shooter)._
+
+- Home: http://www.teeworlds.com
+- State: beta, inactive since 2013
+- Download: https://www.teeworlds.com/?page=downloads
+- Platform: Windows, Linux, macOS
+- Keywords: platform, 2D, online, open content, shooter
+- Code repository: https://github.com/matricks/teeworlds.git
+- Code language: C, C++
+- Code license: zlib
+- Code dependencies: SDL
+- Assets license: CC-BY-SA-3.0
+
+The game provides an arena where players fight in various multiplayer modes (capture the flag, duel, team death match, race). The player is a Tee, a little ball with hands and feet.
+
+Developer: Magnus Auvinen and contributors
+
+## Building