Add CMake entry to projects/README.md

projects/README.md

@@ -5,6 +5,7 @@ This folder contains raylib templates for some common IDEs.
 IDE | Platform | Template type | State
 ----| ---------| ------------- | -----
 [Builder](https://wiki.gnome.org/Apps/Builder) | Linux | example compiling | DONE
+[CMake](https://cmake.org/) | n/a | example compiling and raylib source downloading/building if necessary | DONE
 [CodeBlocks](http://www.codeblocks.org/) | Linux, Windows | example compiling | DONE
 [Geany](https://www.geany.org/) | Linux, Windows | - | INCOMPLETE
 [KDevelop](https://www.kdevelop.org/) | Linux, Windows, macOS | - | INCOMPLETE