 
     var SIValues: [Dictionary<String, Dimension>] {
         return [["Square Meters": UnitArea.squareMeters],
+                ["Ares": UnitArea.ares],
                 ["Hectares": UnitArea.hectares],
                 ["Square Kilometers": UnitArea.squareKilometers]]
     }


    var SIValues: [Dictionary<String, Dimension>] {
        return [["Grams": UnitMass.grams],
                ["Kilograms": UnitMass.kilograms]]
    }

    var imperialValues: [Dictionary<String, Dimension>] {

                ["US fluid Ounces": UnitVolume.fluidOunces],
                ["US liquid Cups": UnitVolume.cups],
                ["US liquid Pints": UnitVolume.pints],
                ["US Quarts": UnitVolume.quarts],
                ["US liquid Gallons": UnitVolume.gallons],
                ["Cubic Feet": UnitVolume.cubicFeet],
                ["Imperial Teaspoons": UnitVolume.imperialTeaspoons],
                ["Imperial Tablespoons": UnitVolume.imperialTablespoons],
                ["Imperial fluid Ounces": UnitVolume.imperialFluidOunces],
                ["Imperial Pints": UnitVolume.imperialPints],
                ["Imperial Quarts": UnitVolume.imperialQuarts],
                ["Imperial Gallons": UnitVolume.imperialGallons]]
    }

