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

entries/unknown_horizons.md

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+# Unknown Horizons
+
+_A 2D real time strategy simulation with an emphasis on economy and city building._
+
+- Home: http://unknown-horizons.org/, https://sourceforge.net/projects/unknownhorizons/
+- Media: https://en.wikipedia.org/wiki/Unknown_Horizons
+- State: beta
+- Download: http://unknown-horizons.org/downloads/
+- Keywords: strategy, clone, inspired by Anno series, singleplayer, turn-based
+- Code repository: https://github.com/unknown-horizons/unknown-horizons.git, https://github.com/unknown-horizons/godot-port.git (+)
+- Code language: Python
+- Code license: GPL-2.0
+- Code dependencies: FIFE, pillow, yaml
+
+Uses the FIFE engine. Godot port: https://github.com/unknown-horizons/godot-port
+
+## Building
+
+- Build system: setup.py