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

entries/panda_3d.md

@@ -0,0 +1,15 @@
+# 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
+