moved the entries up one folder, added the folder to the keywords

games/vassal_engine.md

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+# VASSAL Engine
+
+_Game engine for creating electronic versions of traditional board and card games._
+
+- Home: http://www.vassalengine.org/, https://sourceforge.net/projects/vassalengine/
+- State: mature
+- Download: http://www.vassalengine.org/download.php, https://sourceforge.net/projects/vassalengine/files/
+- Platform: Windows, Linux, macOS
+- Keywords: framework, board game, eingine
+- Code repository: https://svn.code.sf.net/p/vassalengine/svn/ (svn)
+- Code language: Java
+- Code license: LGPL-2.1
+
+Quite a few [VASSAL modules](http://www.vassalengine.org/wiki/Category:Modules).
+
+## Building
+