Cosmetic refactoring

- Update copyright header
- Move private variables to .m file

MP4Atom.h

@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2009, Oleksandr Tymoshenko <[email protected]>
+//  Copyright (c) 2009-2016 Oleksandr Tymoshenko <[email protected]>
 //  All rights reserved.
 // 
 //  Redistribution and use in source and binary forms, with or without
@@ -32,16 +32,11 @@
 #define ITUNES_METADATA_IMAGE_CLASS     0x0e
 #define ITUNES_METADATA_UINT8_CLASS     0x15
 
-@interface MP4Atom : NSObject {
-    NSString *name;
-    UInt32 length;
-    NSArray *children;
-    UInt64 offset;
-}
+@interface MP4Atom : NSObject
 
-@property(readwrite, copy) NSString *name;
-@property(readwrite, assign) UInt32 length;
-@property(readwrite, assign) UInt64 offset;
+@property (copy) NSString *name;
+@property (assign) UInt32 length;
+@property (assign) UInt64 offset;
 
 -(id) initWithName:(NSString*)atom andLength:(UInt32)length;
 -(id) initWithHeaderData:(NSData*)data andOffset: (UInt64)offset;

MP4Atom.m

@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2009, Oleksandr Tymoshenko <[email protected]>
+//  Copyright (c) 2009-2016 Oleksandr Tymoshenko <[email protected]>
 //  All rights reserved.
 // 
 //  Redistribution and use in source and binary forms, with or without
@@ -27,12 +27,13 @@
 
 #import "MP4Atom.h"
 
+@interface MP4Atom() {
+    NSArray *children;
+}
 
-@implementation MP4Atom
+@end
 
-@synthesize length;
-@synthesize offset;
-@synthesize name;
+@implementation MP4Atom
 
 -(id) initWithName: (NSString*)atom andLength:(UInt32)len;
 {
@@ -76,7 +77,7 @@ -(NSData*)encode
     } hdr;
 
     hdr.beLength = htonl(self.length);
-    NSAssert([name getCString:hdr.name maxLength:5 encoding:NSMacOSRomanStringEncoding],
+    NSAssert([self.name getCString:hdr.name maxLength:5 encoding:NSMacOSRomanStringEncoding],
             @"Failed to convert tag name");
     NSData *data = [NSData dataWithBytes:&hdr length:8];
     return data;