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

entries/doxygen.md

@@ -0,0 +1,17 @@
+# Doxygen
+
+_Tool for generating documentation from annotated C++ sources._
+
+- Home: http://www.doxygen.nl/, https://web.archive.org/web/20181202085648/http://www.stack.nl/~dimitri/doxygen/ (previously)
+- Media: https://en.wikipedia.org/wiki/Doxygen
+- State: mature
+- Download: http://www.doxygen.nl/download.html
+- Keywords: tool, library, source documentation generator
+- Code repository: https://github.com/doxygen/doxygen.git
+- Code language: C++
+- Code license: GPL-2.0
+
+## Building
+
+- Build system: CMake
+