Renamed window creation/destruction functions.

Renamed glfwOpenWindow to glfwCreateWindow.
Renamed glfwCloseWindow to glfwDestroyWindow.
Renamed glfwOpenWindowHint to glfwWindowHint.

src/win32_opengl.c

@@ -505,7 +505,7 @@ int _glfwCreateContext(_GLFWwindow* window,
 
 void _glfwDestroyContext(_GLFWwindow* window)
 {
-    // This is duplicated from glfwCloseWindow
+    // This is duplicated from glfwDestroyWindow
     // TODO: Stop duplicating code
     if (window == _glfwLibrary.currentWindow)
         glfwMakeContextCurrent(NULL);