MeasurementPicker Added

[ecordell]

I added a pickerview that adds labels for units, and splits each digit of a number into its own component.

It looks like this:

Which is generated by the following code:

[ActionSheetPicker displayActionPickerWithView:sender 
                                 bigUnitString:@"m" bigUnitMax:330 selectedBigUnit:self.selectedBigUnit 
                               smallUnitString:@"cm" smallUnitMax:99 selectedSmallUnit:self.selectedSmallUnit
                                        target:self action:@selector(measurementWasSelected:::) title:@"Select Length"];

[TimCinel]

Thanks for the contribution :)