moved the entries up one folder, added the folder to the keywords

games/panda3d.md

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+# Panda 3D
+
+_Panda3D is a game engine, a framework for 3D rendering and game development for Python and C++ programs._
+
+- Home: http://www.panda3d.org/
+- Media: https://en.wikipedia.org/wiki/Panda3D
+- State: mature
+- Download: http://www.panda3d.org/download.php
+- Keywords: framework, 3D
+- Code repository: https://github.com/panda3d/panda3d.git
+- Code language: C++, C
+- Code license: 3-clause BSD
+
+## Building
+