Added the missing objective C files for the macosx and fixed the changes you forgot in main.c etc..

Also added a way to handle the right mouse button when the shift key is pressed (for mice with only have 1 button :]).

git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@264 416bcca6-2ee7-4201-b75f-2eb2f807beb1

SDLMain.h

@@ -0,0 +1,11 @@
+/*   SDLMain.m - main entry point for our Cocoa-ized SDL app
+       Initial Version: Darrell Walisser <dwaliss1@purdue.edu>
+       Non-NIB-Code & other changes: Max Horn <max@quendi.de>
+
+    Feel free to customize this file to suit your needs
+*/
+
+#import <Cocoa/Cocoa.h>
+
+@interface SDLMain : NSObject
+@end