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

entries/simple_sokoban.md

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+# Simple Sokoban
+
+_Simple Sokoban game aimed at playability and portability across systems._
+
+- Home: http://simplesok.sourceforge.net/, https://sourceforge.net/projects/simplesok/
+- State: mature, inactive since 2014
+- Download: https://sourceforge.net/projects/simplesok/files/
+- Keywords: library, open content, sokoban-like
+- Code repository: https://svn.code.sf.net/p/simplesok/code/ (svn)
+- Code language: C
+- Code license: GPL-3.0
+- Code dependencies: SDL
+- Assets license: ? (GPL)
+
+Developer: Mateusz Viste
+
+## Building