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

entries/crossfire.md

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+# Crossfire
+
+_Cooperative multiplayer graphical RPG and adventure game._
+
+- Home: http://crossfire.real-time.com/, https://sourceforge.net/projects/crossfire/
+- Media: https://en.wikipedia.org/wiki/Crossfire_(1992_video_game)
+- State: mature
+- Download: http://crossfire.real-time.com/download/index.html, https://sourceforge.net/projects/crossfire/files/
+- Keywords: role playing, massive multiplayer online
+- Code repository: https://svn.code.sf.net/p/crossfire/code/ (svn active)
+- Code language: C, Java
+- Code license: GPL-2.0
+
+See also [Gridarta for Crossfire, the map editor](https://sourceforge.net/projects/gridarta/).
+
+## Building
+