Add links to README.md

README.md

@@ -1,13 +1,13 @@
 # Basic C SDL project
 
-This project is a basic C SDL project that uses CMake as a build system.
+This project is a basic C [SDL][] project that uses [CMake][] as a build system.
 
 ## Dependencies
 
-- Git
+- [Git][]
 - C Compiler (gcc, ...)
-- CMake
-- SDL2 library
+- [CMake][]
+- [SDL2][SDL] library
 
 **On Debian/Ubuntu based distributions, use the following command:**
 
@@ -17,9 +17,9 @@ sudo apt install git-core build-essential pkg-config cmake cmake-data libsdl2-de
 
 **Optional packages:**
 
-- SDL2_image library
-- SDL2_ttf library
-- SDL2_gfx library
+- [SDL2_image][] library
+- [SDL2_ttf][] library
+- [SDL2_gfx][] library
 
 ```sh
 sudo apt install libsdl2-image-dev libsdl2-ttf-dev libsdl2-gfx-dev
@@ -52,3 +52,11 @@ some instructions in the CMakeLists.txt file and re-execute `cmake ..` and `make
 This project is distributed under the terms of the MIT license
 [<LICENSE>](LICENSE).
 
+
+
+[SDL]: https://www.libsdl.org
+[CMake]: https://cmake.org
+[Git]: https://git-scm.com
+[SDL2_image]: https://www.libsdl.org/projects/SDL_image
+[SDL2_ttf]: https://www.libsdl.org/projects/SDL_ttf
+[SDL2_gfx]: http://www.ferzkopp.net/wordpress/2016/01/02/sdl_gfx-sdl2_gfx