"title" attribute needed on <o:column> and <o:cell>

[openfaces]

[Nicholas Oxhøj] I think you should add the possibility to add a "title" to both <o:column> and <o:cell>, which would be placed on the resulting

. Just like RichFaces has: http://docs.jboss.org/richfaces/latest_3_3_X/en/tlddoc/rich/column.html

Right now it is only possible to put tooltips on something inside the cell, but in a lot of cases (e.g. if the content is quite small) it would make much more sense to have the tooltip on the whole cell.