Enhancement - Add an "attribute" property in Cell class

[GoogleCodeExporter]

ZKSS 2.1.0

Hi
I am using the spreadsheet as a grid because I need to drag and drop between 
cells in my application. I would, if possible, that in a future release you 
have added a property "attribute" (as in other components) where we could by 
some object or value.

thanks

Original issue reported on code.google.com by andreas....@gmail.com on 20 Jun 2011 at 7:14

[GoogleCodeExporter]

http://tracker.zkoss.org/browse/ZSS-23
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Original comment by chenhe...@gmail.com on 15 Jul 2011 at 7:35