Feature to drag a file from Windows to Mac:

- On Mac client main thread is used for cocoa application in order to simulate drag.
- Send dragging file dir from Windows server to Mac client while dragging after switching screen.
- Dragging information sending is immature now (need to support multi files dragging in the future).
- Used Cocoa function to monitor dragg pasteboard.
- Changed Mac client to use another thread for event queue instead of the main thread.
- Change fileRecieveComplete to fileRecieveCompleted.

src/lib/platform/CMSWindowsScreen.cpp

@@ -699,7 +699,7 @@ CMSWindowsScreen::fakeMouseButton(ButtonID id, bool press)
 }
 
 void
-CMSWindowsScreen::fakeMouseMove(SInt32 x, SInt32 y) const
+CMSWindowsScreen::fakeMouseMove(SInt32 x, SInt32 y)
 {
 	m_desks->fakeMouseMove(x, y);
 }