Re-add GLFW docs (#117)

* timetabled study progress

* Finish

Author: Perksey

src/Lab/CLMultiplication/Program.cs

@@ -6,6 +6,10 @@ namespace CLMultiplication
 {
     internal class Program
     {
+        private static int Factorial(int n)
+        {
+            return n <= 1 ? 1 : n * Factorial(n - 1);
+        }
         private static unsafe void Main(string[] args)
         {
             string[] kernelCode =
@@ -15,12 +19,6 @@ private static unsafe void Main(string[] args)
                 "}"
             };
 
-
-            int Factorial(int n)
-            {
-                return n <= 1 ? 1 : n * Factorial(n - 1);
-            }
-
             // OpenCL related declarations
             int err;
             IntPtr platform;