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

entries/cataclysm_dark_days_ahead.md

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+# Cataclysm: Dark Days Ahead
+
+_Turn-based survival game set in a post-apocalyptic world._
+
+- Home: https://cataclysmdda.org/, https://discourse.cataclysmdda.org/
+- State: mature 
+- Download: https://cataclysmdda.org/releases/
+- Platform: Windows, Linux, macOS
+- Keywords: role playing, inspired by Cataclysm, remake, roguelike
+- Code repository: https://github.com/CleverRaven/Cataclysm-DDA.git
+- Code language: C++
+- Code license: CC-BY-SA-3.0
+- Code dependencies: ncurses
+- Assets license: CC-BY-SA-3.0
+
+Fork of [Cataclysm](cataclysm.md)
+
+## Building
+
+- Build system: Make
+- Build instructions: https://github.com/CleverRaven/Cataclysm-DDA/blob/master/COMPILING.md