Switch to native frameworks

We now build a Cocoa application built on LibRingClient.
Qt bindings are working (need stabilization)

Refs #64818
diff --git a/ConversationsViewController.h b/ConversationsViewController.h
new file mode 100644
index 0000000..1b0a35b
--- /dev/null
+++ b/ConversationsViewController.h
@@ -0,0 +1,19 @@
+//
+//  ConversationsViewController.h
+//  Ring
+//
+//  Created by Alexandre Lision on 2015-02-02.
+//
+//
+
+#import <Cocoa/Cocoa.h>
+#import "QNSTreeController.h"
+
+@interface ConversationsViewController : NSViewController <NSOutlineViewDelegate> {
+    NSOutlineView *conversationsView;
+}
+
+@property QNSTreeController *treeController;
+@property (assign) IBOutlet NSOutlineView *conversationsView;
+
+@end