Datecolumn

A branch with a DateColumn.

I first started using https://github.com/collective/Products.DataGridField/blob/lepri-datetime-column/Products/DataGridField/ but couldn't get that to work. (That branch requires collective.js.jqueryui, which is a big overhead and messed up my JS setup. I was too lazy to figure it out.) I did use some of the code, though.

This branch uses only plone.app.jquerytools (1.2 or higher), and was tested in a Plone 4.0 instance.