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

entries/tangomon.md

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+# Tangomon
+
+_Educational monster-battling game, similar in concept to the popular Pokemon series but with an educational twist._
+
+- Home: http://tangomon.nongnu.org, https://savannah.nongnu.org/projects/tangomon/
+- State: mature, inactive since 2017
+- Download: http://tangomon.nongnu.org/download.html
+- Platform: Windows, Linux
+- Keywords: educational, for kids, open content
+- Code repository: https://git.savannah.nongnu.org/git/tangomon.git, http://cvs.savannah.nongnu.org:/web/tangomon (cvs)
+- Code language: Python
+- Code license: GPL-3.0
+- Code dependencies: SGE Game Engine
+- Assets license: various
+
+Developer: onpon4
+
+## Building