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

entries/free_mars.md

@@ -0,0 +1,17 @@
+# Free Mars
+
+_Turn based free strategy game about colonizing Mars._
+
+- Home: https://sourceforge.net/projects/freemars
+- State: mature
+- Download: https://sourceforge.net/projects/freemars/files
+- Platform: Windows, Linux, macOS
+- Keywords: strategy, turn-based
+- Code repository: https://svn.code.sf.net/p/freemars/code/ (svn active)
+- Code language: Java
+- Code license: GPL-3.0
+
+
+## Building
+
+- Build system: Ant