Made glfwGetCursorPos query system directly.

Fixes #103.
Fixes #153.
Fixes #193.
Fixes #355.
Fixes #381.

src/cocoa_platform.h

@@ -63,6 +63,11 @@ typedef struct _GLFWwindowNS
     id              view;
     unsigned int    modifierFlags;
 
+    // The total sum of the distances the cursor has been warped
+    // since the last cursor motion event was processed
+    // This is kept to counteract Cocoa doing the same internally
+    double          warpDeltaX, warpDeltaY;
+
 } _GLFWwindowNS;