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

entries/open_cube.md

@@ -0,0 +1,14 @@
+# Open Cube
+
+_Remake of Cube 2: Sauerbraten._
+
+- Home: http://team-cube.github.io/
+- State: beta, inactive since 2017
+- Keywords: game engine, inspired by Cube 2: Sauerbraten, remake
+- Code repository: https://github.com/team-cube/open-cube.git
+- Code language: C++
+- Code license: zlib
+
+## Building
+
+- Build system: Make