CSV export now uses raw data and removes duplicate columns.

Change-Id: I44d302f1d69cdf3166d4826c751eca90e11def2d
Now implementing IVisToolWithSelectableAttributes

Change-Id: I9de51e60c1a22d21bf2efebbc2160626114637d1
Added menu item Data -> Export CSV from all visualizations. No longer
need ICSVExportable because all tools implement
IVisToolWithSelectableAttributes.

Change-Id: I8da57300fcaf0c0b5147f8ebfcbc44c77e5632fe