Add a preferences window

This adds a preference window with default preferences to change the
sparkle options and to set a custom path to a git binary.

PBPrefsWindowController.h

@@ -0,0 +1,29 @@
+//
+//  PBPrefsWindowController.h
+//  GitX
+//
+//  Created by Christian Jacobsen on 02/10/2008.
+//  Copyright 2008 __MyCompanyName__. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+#import "DBPrefsWindowController.h"
+
+@interface PBPrefsWindowController : DBPrefsWindowController {
+	/* Outlets for Preference Views */
+	IBOutlet NSView *generalPrefsView;
+	IBOutlet NSView *updatesPrefsView;
+
+	/* Variables for the Updates View */
+	IBOutlet NSPathControl *gitPathController;
+	IBOutlet NSImageView *badGitPathIcon;
+	IBOutlet NSView *gitPathOpenAccessory;
+	NSOpenPanel *gitPathOpenPanel;
+
+}
+
+- (IBAction) checkGitValidity: sender;
+- (void)pathCell:(NSPathCell *)pathCell willDisplayOpenPanel:(NSOpenPanel *)openPanel;
+- (IBAction) showHideAllFiles: sender;
+
+@end