Added more input functions to clarify internal API.

src/internal.h

diff --git a/src/internal.h b/src/internal.h
index 2d38912..bfe24fb 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -339,12 +339,18 @@
 // Window management (window.c)
 void _glfwSetDefaultWindowHints(void);
 
-// Input handling (window.c)
+// WIndow event notification
+void _glfwInputWindowFocus(_GLFWwindow* window, GLboolean activated);
+void _glfwInputWindowPos(_GLFWwindow* window, int x, int y);
+void _glfwInputWindowSize(_GLFWwindow* window, int width, int height);
+void _glfwInputWindowIconify(_GLFWwindow* window, int iconified);
+
+// Input event notification
 void _glfwInputKey(_GLFWwindow* window, int key, int action);
 void _glfwInputChar(_GLFWwindow* window, int character);
 void _glfwInputScroll(_GLFWwindow* window, int x, int y);
 void _glfwInputMouseClick(_GLFWwindow* window, int button, int action);
-void _glfwInputWindowFocus(_GLFWwindow* window, GLboolean activated);
+void _glfwInputCursorMotion(_GLFWwindow* window, int x, int y);
 
 // OpenGL context helpers (opengl.c)
 int _glfwStringInExtensionString(const char* string, const GLubyte* extensions);