Add guide for SOIL setup.

Author: mirastroie

README.md

@@ -15,6 +15,7 @@ To run the application, the following libraries must be installed:
 -   [GLEW](http://glew.sourceforge.net/)
 -   [glm](https://glm.g-truc.net/0.9.9/)
 -   [GLFW](https://www.glfw.org/download)
+-   [SOIL](https://moodle.unibuc.ro/pluginfile.php/142721/mod_folder/content/0/SOIL.lib?forcedownload=1)
 
 ## Installation steps for Windows and Visual Studio
 
@@ -34,6 +35,8 @@ After downloading the library files:
 
 -   for **glm**, extract the `zip` in the project folder. Make sure to keep the parent `glm` folder, in which you can find multiple other files and folders.
 
+-   for **SOIL**: copy SOIL.lib to the coresponding directory
+
 In Visual Studio, the libraries must be linked to the project.
 
 Go to `Project -> Properties -> Configuration Properties -> Linker -> Input -> Additional Dependencies` and add
@@ -42,5 +45,6 @@ Go to `Project -> Properties -> Configuration Properties -> Linker -> Input -> A
 -   `glew32.lib`
 -   `opengl32.lib`
 -   `glfw3.lib`
+-   `<complete path to VS include folder>\SOIL.lib`
 
 Done!