add oversampler

oversampling/WDL/swell/swellappmain.h

@@ -0,0 +1,14 @@
+#import <Cocoa/Cocoa.h>
+
+
+@interface SWELLApplication : NSApplication {
+
+}
+- (void)sendEvent:(NSEvent *)anEvent;
+
+@end
+
+@interface SWELLAppController : NSObject { 
+}
+-(IBAction)onSysMenuCommand:(id)sender;
+@end