Online protocol improvements (#1393)

* Chartkey generation

* Simfile filehash generation

* Read filehash on NSCRSG. Add FLU packets and friendlist vectors. Add
getserverversion method. Send chartkey, filehash and rate on start request.

* Use filehash to find the selected song if it is not empty.

* Friendlist update broadcast.

* Send note row size if it's bigger than 1

* Used for chartkey generation

* Define the ReportScore function with numNotes when WITHOUT_NETWORKING is defined

src/ScreenNetSelectBase.cpp

@@ -28,6 +28,7 @@
 
 AutoScreenMessage( SM_AddToChat );
 AutoScreenMessage( SM_UsersUpdate );
+AutoScreenMessage( SM_FriendsUpdate );
 AutoScreenMessage( SM_SMOnlinePack );
 
 REGISTER_SCREEN_CLASS( ScreenNetSelectBase );
@@ -135,6 +136,10 @@ void ScreenNetSelectBase::HandleScreenMessage( const ScreenMessage SM )
 	{
 		UpdateUsers();
 	}
+	else if (SM == SM_FriendsUpdate)
+	{
+		MESSAGEMAN->Broadcast("FriendsUpdate");
+	}
 
 	ScreenWithMenuElements::HandleScreenMessage( SM );
 }