renamed games folder to entries folder (also contained frameworks, libraries, ...) and added to the backlog

entries/arianne_marauroa.md

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+# Arianne / Marauroa
+
+_An open source multiplayer online framework._
+
+- Home: https://arianne-project.org/, https://arianne-project.org/engine/marauroa.html, https://sourceforge.net/projects/arianne/
+- State: mature
+- Download: https://arianne-project.org/engine/marauroa.html
+- Keywords: framework, 2D, multiplayer
+- Code repository: https://git.code.sf.net/p/arianne/marauroa, http://arianne.cvs.sourceforge.net (cvs)
+- Code language: Java
+- Code license: GPL-2.0
+
+Framework/engine is the Marauroa subproject.
+
+## Building
+
+Uses Ant
+