added some code dependencies and maintenance

entries/glew.md

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+# GLEW
+
+_OpenGL extension loading library._
+
+- Home: http://glew.sourceforge.net/, https://www.opengl.org/sdk/libs/GLEW/
+- Media: https://en.wikipedia.org/wiki/OpenGL_Extension_Wrangler_Library
+- State: mature
+- Platform: Windows, Linux, macOS
+- Keywords: library
+- Code repository: https://github.com/nigels-com/glew.git
+- Code language: C, C++, Perl
+- Code license: 3-clause BSD
+
+## Building
+
+- Build system: Make