Examples adjustments.

* French to English punctuation.
* Pong and Shader use fixed-sized windows now (especially on tiling
  window managers, the windows will be resized automatically, thus
  making the examples look and also behave weirdly).

examples/voip/VoIP.cpp

@@ -28,7 +28,7 @@ int main()
 
     // Client or server ?
     char who;
-    std::cout << "Do you want to be a server ('s') or a client ('c') ? ";
+    std::cout << "Do you want to be a server ('s') or a client ('c')? ";
     std::cin  >> who;
 
     if (who == 's')