implemented CPTableColumn isHidden nib2cib support

AppKit/CPTableColumn.j

@@ -395,7 +395,8 @@ var CPTableColumnIdentifierKey   = @"CPTableColumnIdentifierKey",
     CPTableColumnWidthKey        = @"CPTableColumnWidthKey",
     CPTableColumnMinWidthKey     = @"CPTableColumnMinWidthKey",
     CPTableColumnMaxWidthKey     = @"CPTableColumnMaxWidthKey",
-    CPTableColumnResizingMaskKey = @"CPTableColumnResizingMaskKey";
+    CPTableColumnResizingMaskKey = @"CPTableColumnResizingMaskKey",
+    CPTableColumnIsHiddenkey     = @"CPTableColumnIsHiddenKey";
 
 @implementation CPTableColumn (CPCoding)
 
@@ -417,6 +418,7 @@ var CPTableColumnIdentifierKey   = @"CPTableColumnIdentifierKey",
         [self setHeaderView:[aCoder decodeObjectForKey:CPTableColumnHeaderViewKey]];
 
         _resizingMask  = [aCoder decodeBoolForKey:CPTableColumnResizingMaskKey];
+        _isHidden = [aCoder decodeBoolForKey:CPTableColumnIsHiddenkey];
     }
 
     return self;
@@ -434,6 +436,7 @@ var CPTableColumnIdentifierKey   = @"CPTableColumnIdentifierKey",
     [aCoder encodeObject:_dataView forKey:CPTableColumnDataViewKey];
 
     [aCoder encodeObject:_resizingMask forKey:CPTableColumnResizingMaskKey];
+    [aCoder encodeBool:_isHidden forKey:CPTableColumnIsHiddenkey];
 }
 
 @end

Tools/nib2cib/NSTableColumn.j

@@ -52,6 +52,7 @@
         _maxWidth = [aCoder decodeFloatForKey:@"NSMaxWidth"];
 
         _resizingMask = [aCoder decodeBoolForKey:@"NSIsResizeable"] ? CPTableColumnUserResizingMask : CPTableColumnAutoresizingMask;
+        _isHidden = [aCoder decodeBoolForKey:@"NSHidden"];
     }
 
     return self;