Check to make sure that the fields in a DataSet are the proper length

It is possible in a DataSet to add a point field (or coordinate system) that has a different number of points than reported in the cell set. Likewise for the number of cells in cell fields. This is very bad practice because it is likely to lead to crashes in worklets that are expecting arrays of an appropriate length.

Although DataSet will still allow this, a warning will be added to the VTK-m logging to alert users of the inconsistency introduced into the DataSet. Since warnings are by default printed to standard error, users are likely to see it.